Postfix - can't send/recieve mails to/from outside world

Postfix - can't send/recieve mails to/from outside world

Hello everyone:

I followed the Perfect Setup Ubuntu 7.04 to install my server.
Almost everything works ok, but Postfix throws some errors.

These are the cases:
NOTE: I've changed the servers' real names...I use myserver.com (my linux server) and recipient.com (external mail server)

1. If I try to send messages from Webmin mail interface (to addresses different to gmail.com and local - this does works ok) Postfix says it can't deliver the mails, here is part of my /var/log/mail.log

Code:

Nov 16 18:38:23 myserver postfix/smtp[12426]: certificate verification failed for recipient.com: num=18:self signed certificate
Nov 16 18:38:24 myserver postfix/smtp[12426]: 2D2F397C3E2: to=<myuser@recipient.com>, relay=recipient[72.71.70.69]:25, delay=3.3, delays=0.02/0.$
Nov 16 18:38:24 myserver postfix/cleanup[12424]: 7C57597C3E3: message-id=<20071117023824.7C57597C3E3@myserver.com>
Nov 16 18:38:24 myserver postfix/bounce[12428]: 2D2F397C3E2: sender non-delivery notification: 7C57597C3E3
Nov 16 18:38:24 myserver postfix/qmgr[29547]: 7C57597C3E3: from=<>, size=2485, nrcpt=1 (queue active)
Nov 16 18:38:24 myserver postfix/qmgr[29547]: 2D2F397C3E2: removed
Nov 16 18:38:24 myserver postfix/local[12429]: 7C57597C3E3: to=<myuser@myserver.com>, relay=local, delay=0.02, delays=0.01/0/0/0, dsn=2.0.0, status=sent (delivered $
Nov 16 18:38:24 myserver postfix/qmgr[29547]: 7C57597C3E3: removed

2. I can't neither send nor receive messages with my email clients (thunderbird and evolution). I checked the "server requires authentication" option, using every possible combination (TLS, SSL, No security, etc) but it time outs the connection.

3. I can send messages to gmail.com and yahoo.com (with some troubles, I use the "force queued" webmin feature ), but not to hotmail.com

This is my main.cf

Code:

smtpd_banner = $myhostname ESMTP $mail_name (Linux)
biff = no
append_dot_mydomain = no

# TLS parameters
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache

myhostname = myserver.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = 
relayhost =
mynetworks = 127.0.0.0/8
mailbox_command =
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_tls_auth_only = no
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom

virtual_maps = hash:/etc/postfix/virtusertable

home_mailbox = Maildir/

My master.cf is:

Code:

smtp      inet  n       -       -       -       -       smtpd
pickup    fifo  n       -       -       60      1       pickup
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       -       1000?   1       tlsmgr
rewrite   unix  -       -       -       -       -       trivial-rewrite
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       -       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       -       -       -       smtp
relay     unix  -       -       -       -       -       smtp
	-o fallback_relay=
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
discard   unix  -       -       -       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       -       -       -       lmtp
anvil     unix  -       -       -       -       1       anvil
scache	  unix	-	-	-	-	1	scache

maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}

uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)

ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix	-	n	n	-	2	pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman   unix  -       n       n       -       -       pipe
  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
  ${nexthop} ${user}

My /etc/postfix/local-host-names is:

Code:

# ISPConfig local-host-names Configuration File
localhost
myserver.com
localhost.myserver.com
localhost.com
localhost.localdomain

I'm not using ISPConfig, but I'd installed it.

I did do the next step:

Code:

"If you do not want to use ISPConfig, configure Postfix to deliver emails to a user's Maildir*:

postconf -e 'home_mailbox = Maildir/'
postconf -e 'mailbox_command ='
/etc/init.d/postfix restart"

I did it because I don't use it.

I did "telnet localhost 25" and this is the result:

Code:

mysuer@myserver:~$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 myserver.com ESMTP Postfix (Linux)
ehlo localhost
250-myserver.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
Connection closed by foreign host.

_________FOLLOW IN THE NEXT POST DUE TO SIZE RESTRICTION__________

 

Postfix - can't send/recieve mails to/from outside world (part 2)

My netstat -tap shows thw following:

Code:

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
tcp        0      0 *:afs3-update           *:*                     LISTEN     12178/nxagent       
tcp        0      0 localhost:2208          *:*                     LISTEN     8820/hpiod          
tcp        0      0 *:mysql                 *:*                     LISTEN     31881/mysqld        
tcp        0      0 *:netbios-ssn           *:*                     LISTEN     4567/smbd           
tcp        0      0 *:webmin                *:*                     LISTEN     21962/perl          
tcp        0      0 *:www                   *:*                     LISTEN     1678/apache2        
tcp        0      0 *:81                    *:*                     LISTEN     4776/ispconfig_http 
tcp        0      0 *:ftp                   *:*                     LISTEN     23734/proftpd: (acc 
tcp        0      0 myserver.local:domain       *:*                     LISTEN     4963/named          
tcp        0      0 localhost:domain        *:*                     LISTEN     4963/named          
tcp        0      0 localhost:ipp           *:*                     LISTEN     3240/cupsd          
tcp        0      0 *:smtp                  *:*                     LISTEN     29542/master        
tcp        0      0 localhost:953           *:*                     LISTEN     4963/named          
tcp        0      0 localhost:6010          *:*                     LISTEN     12890/sshd: nx@nott 
tcp        0      0 *:https                 *:*                     LISTEN     1678/apache2        
tcp        0      0 *:microsoft-ds          *:*                     LISTEN     4567/smbd           
tcp        0      0 localhost:2207          *:*                     LISTEN     8823/python         
tcp        0      0 localhost:35912         localhost:5008          ESTABLISHED12925/nxssh         
tcp        0      0 localhost:5008          localhost:35912         ESTABLISHED12178/nxagent       
tcp        0      0 localhost:41708         localhost:ssh           TIME_WAIT  -                   
tcp        0      0 localhost:41706         localhost:ssh           TIME_WAIT  -                   
tcp        0      0 localhost:41707         localhost:ssh           TIME_WAIT  -                   
tcp        0      0 localhost:41086         localhost:ssh           ESTABLISHED12159/nxssh         
tcp6       0      0 *:afs3-update           *:*                     LISTEN     12178/nxagent       
tcp6       0      0 *:imaps                 *:*                     LISTEN     4432/couriertcpd    
tcp6       0      0 *:pop3s                 *:*                     LISTEN     4476/couriertcpd    
tcp6       0      0 *:pop3                  *:*                     LISTEN     4445/couriertcpd    
tcp6       0      0 *:imap2                 *:*                     LISTEN     4412/couriertcpd    
tcp6       0      0 *:domain                *:*                     LISTEN     4963/named          
tcp6       0      0 *:ssh                   *:*                     LISTEN     4601/sshd           
tcp6       0      0 *:smtp                  *:*                     LISTEN     29542/master        
tcp6       0      0 ip6-localhost:953       *:*                     LISTEN     4963/named          
tcp6       0      0 ip6-localhost:6010      *:*                     LISTEN     12890/sshd: nx@nott 
tcp6       0      0 localhost:ssh           localhost:41086         ESTABLISHED12160/sshd: myuser [pr 
tcp6       0      0 ::ffff:10.20.14.76%:ssh dsl-189-164-188-2:55574 ESTABLISHED11999/sshd: myuser [pr 
tcp6       0   2592 ::ffff:10.20.14.76%:ssh dsl-189-164-188-2:59810 ESTABLISHED12888/sshd: nx [pri 

I don't know why, but I found the following in my /var/log/mail.err

Code:

Nov 15 18:19:24 imep postfix/sendmail[23609]: fatal: usage: sendmail [options]
Nov 15 18:19:34 imep postfix/sendmail[23614]: fatal: usage: sendmail [options]

The returned messages shows:

Code:

This is the mail system at host myserver.com

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<user@recipient.com>: host recipient.com[72.29.90.31] said:
    550-Verification failed for <myuser@myserver.com> 550-No Such User Here 550
    Sender verify failed (in reply to RCPT TO command)

and

Code:

Reason for failure 	 550-Verification failed for <myuser@myserver.com> 550-No

I know the user exists in recipient.com because that account is mine.

4. If I try to send messages from gmail.com to myuser@myserver.com gmail returns the following:

Code:

Delivery to the following recipient failed permanently:

    myuser@myserver.com

Technical details of permanent failure:
PERM_FAILURE: SMTP Error (state 13): 554 <myuser@myserver.com>: Relay access denied

Please, Heeelp! I losing my mind due to this trouble!

Sorry, but I don't speak english, I hope you can understand.

Thanks in advance.

 

mydestination should read

Code:

mydestination = /etc/postfix/local-host-names

in /etc/postfix/main.cf.

Also make sure that your server isn't blacklisted ( http://www.mxtoolbox.com/blacklists.aspx ) and that your ISP doesn't block port 25.

 

Not blacklisted

first, thanks a lot for your answer...

second:

1. My server isn't blocked.

2. now, mydestination = /etc/postfix/local-host-names, but postfix throws the same errors as shown at my first and second posts.

3. I don't know if my ISP is blocking the port 25, how can I know that?

Supposing that my ISP is blocking the port 25, isn't it supposed that this port is to send mails and not for receive mails? and, isn't it supposed that blocking the port doesn't allow the incoming mails and outgoing mail should be received by recipients?

Why I can't send mail from gmail to my server? isn't supposed that the mail is received through POP3 or IMAP port? it could be because the ports IMAP/993
and POP3/995 could be blocked?

I understand that, if I want to send mails through myserver.com with Evolution and the port 25 is blocked in my server, Evolution will not be able to send them. And that sending mails from my server's web-based mail client to servers that requires server authentication will no be possible due to the fact that I can't select the "server requires authentication" option in a web-based mail client.

But, is there a web-based mail client which have such option?

Thanks in advance...

 

smtp, pop, imap

Does this means that port 25 is open?

Code:

tcp        0      0 *:smtp                  *:*                     LISTEN     29542/master           
tcp6       0      0 *:imaps                 *:*                     LISTEN     4432/couriertcpd    
tcp6       0      0 *:pop3s                 *:*                     LISTEN     4476/couriertcpd    
tcp6       0      0 *:pop3                  *:*                     LISTEN     4445/couriertcpd    
tcp6       0      0 *:imap2                 *:*                     LISTEN     4412/couriertcpd    
tcp6       0      0 *:smtp                  *:*                     LISTEN     29542/master      

 

Ask your ISP.

The whole SMTP communication happens on port 25. Your mailserver sends out mails on port 25, and the receiving server gets it on port 25 (and the other way round). Port 110 (POP3) is used only when your mail client (Outlook, Thunderbird, etc.) connets to your mail server to fetch mails.

You don't need this in a webmail client because most mail servers allow connections from localhost without authentication, and a webmail client aömost always connects to a mailserver on localhost.

 

port is not blocked

Again, thanks for your answer...

My ISP says that my port 25 isn't blocked in any way, and I don't have any iptables rules or any other type of firewall; nmap shows that port is open, but shows the port as "open|filtered", shows my SSH port "open|filtered" too and I can connect to my server with no problems through port 22.


what could be wrong?

thanks in advance

 

One step beyond

Well, I edited the encryption settings in Evolution Mail and Thunderbird and now I can send messages to servers not requiring server authentication as gmail, yahoo (not hotmail).

I was using SSL to send messages instead of TSL or No Encryption (with this last options I can send messages through Evo and Thunderbird), I can't do it with SSL selected.

Although I can send mails to some servers thtough Evo, I can't fetch the mails from myserver.com to Evo. Please help!

If I send a mail (through Evo) to a server that requires server authentication, my mail.log shows the following:

Code:

Nov 19 18:10:23 myserver postfix/pickup[1859]: D07C1B24001: uid=0 from=<myuser@myserver.com>
Nov 19 18:10:23 myserver postfix/cleanup[2884]: D07C1B24001: message-id=<1195524623.2880@myserver.com>
Nov 19 18:10:23 myserver postfix/qmgr[21868]: D07C1B24001: from=<myuser@myserver.com>, size=13884, nrcpt=2 (queue active)
Nov 19 18:10:26 myserver postfix/smtp[2886]: certificate verification failed for recipient.com: num=18:self signed certificate
Nov 19 18:10:26 myserver postfix/smtp[2887]: D07C1B24001: to=<account_1@gmail.com>, relay=gmail-smtp-in.l.google.com[209.85.147.27]:25, delay=2.9, delays=0.02/$
Nov 19 18:10:27 myserver postfix/smtp[2886]: D07C1B24001: to=<user@recipient.com>, relay=recipient.com[55.29.80.31]:25, delay=3.4, delays=0.02/0.0$
Nov 19 18:10:27 myserver postfix/cleanup[2884]: 488A197C3DD: message-id=<20071120021027.488A197C3DD@myserver.com>
Nov 19 18:10:27 myserver postfix/bounce[2888]: D07C1B24001: sender non-delivery notification: 488A197C3DD
Nov 19 18:10:27 myserver postfix/qmgr[21868]: 488A197C3DD: from=<>, size=15798, nrcpt=1 (queue active)
Nov 19 18:10:27 myserver postfix/qmgr[21868]: D07C1B24001: removed
Nov 19 18:10:27 myserver postfix/local[2889]: 488A197C3DD: to=<myuser@myserver.com>, relay=local, delay=0.02, delays=0/0/0/0.01, dsn=2.0.0, status=sent (delivered t$
Nov 19 18:10:27 myserver postfix/qmgr[21868]: 488A197C3DD: removed

If I send a mail (through Evo) to hotmail, my mail.log shows the following:

Code:

Nov 19 18:19:21 imep postfix/smtpd[3003]: warning: 189.164.188.21: hostname dsl-189-164-188-21.prod.com verification failed: Name or service no$
Nov 19 18:19:21 imep postfix/smtpd[3003]: connect from unknown[189.164.188.21]
Nov 19 18:19:22 imep postfix/smtpd[3003]: 20EAB97C3D9: client=unknown[189.40.188.21], sasl_method=PLAIN, sasl_username=myuser
Nov 19 18:19:22 imep postfix/cleanup[3007]: 20EAB97C3D9: message-id=<1195517975.7003.17.camel@ubuntu>
Nov 19 18:19:22 imep postfix/qmgr[21868]: 20EAB97C3D9: from=<myuser@myserver.com>, size=567, nrcpt=2 (queue active)
Nov 19 18:19:22 imep postfix/smtpd[3003]: disconnect from unknown[189.164.188.21]
Nov 19 18:19:23 imep postfix/smtp[3008]: 20EAB97C3D9: to=<user_1@hotmail.com>, relay=mx3.hotmail.com[65.54.244.200]:25, delay=1, delays=0.36/0.01/0.41$
Nov 19 18:19:23 imep postfix/smtp[3008]: 20EAB97C3D9: to=<user_2@hotmail.com>, relay=mx3.hotmail.com[65.54.244.200]:25, delay=1, delays=0.36/0.01/0.41/0.2$
Nov 19 18:19:23 imep postfix/qmgr[21868]: 20EAB97C3D9: removed

I appreciate your help. Thanks in advance.

 

two steps beyond

Well, I edited the encryption settings in POP3 Evolution Mail and Thunderbird (now is SSL) and and now I can receive messages from my server.

I think this could be very difficult to the final users to configure theirs outlook/thunderbird with POP3 SSL and SMPT TSL.

Is there a way in which I don't need to put SSL to POP3?

I still can't send mails through Evo and gmail (etc webmails )to my server...

 

Are you sure you followed the tutorial as close as possible? Because you don't need SSL to connect to the server.

 

tutorial

Yes, but I see something weird in the SSL certificate, Thunderbird says something like: "you're trying to connect to myserver.com but the SSL certificate owns to localhost"

 

Here again

Hi, I've followed again the Perfect setup 7.04 tutorial, after uninstall what I'd installed the first time.

Same errors occurred, please, what can I do?

 

Please try to use normal POP3 (port 110) and SMTP (port 25) - no SSL or TLS.

 

reconfigure

Ok, but now I have my postfix configured to work with TLS and SSL, how can I reconfigure it to work without TLS and SSL and to work with the normal ports?

 

If you've followed the "Perfect Setup", then your setup is already capable of doing this.

 

switch ports

When you say: "try to use normal POP3 (port 110) and SMTP (port 25)", do you mean I need to change a configuration in some place?
where I need to switch the ports?

Thanks again and sorry, I'm a newbie as you can see

 

Testing

Well, I don't know if this is what you asked for, but:

These are the cases using Thunderbird:

INCOMING MAIL
1. I can't receive mails if one of the

Code:

"TLS, if available" (Port 110), "TLS" (Port 110), or "Never" (Port 110) 

options is selected, Thunderbird returns

Code:

Connection to server myserver.com timed out

2. I cant' receive mails if "use secure authentication" option is selected, it doesn't matter which option of point 1 is selected. Thunderbird returns:

Code:

"Mail server does not support secure authentication"

3. I can fetch mails only if I select the "SSL(Port 995) option in "Use secure connection" and if I don't select "use secure authentication".

OUTGOING MAIL
1. In "Security and Authentication" I select "Use name and password", User name: myuser.

If I select "Use secure connection->No" (Port 25) I can send messages to gmail and yahoo, but hotmail (no errors are returned, simply the mail doesn't appear in hotmail inbox).
I can send messages to some domains different to gmail and yahoo (those domains aren't public webmail services) , but I can send mails to 2 domains in different shared hostings.

Code:

<some_user@shared_hosting_domain.com>: host shared_hosting_domain.com[73.69.10.37] said:
    550-Verification failed for <myuser@myserver.com > 550-No Such User Here 550
    Sender verify failed (in reply to RCPT TO command)

2. If I select "Use secure connection->TLS" (Port 25) Thunderbird throws the following in an alert window:

Code:

Unable to verify the identity of MYSITE as a trusted site.

Posible reasons for this error:
-Your browser does not recognize the Certificate Authority that issued the site's certificate.
-The site's certificate is incomplete due to a server misconfiguration.
-You are connected to a site pretending to be MYSITE, posible to obtain your confidential information.

Please notify the site's webmaster about this problem.

Before accepting this certificate, you should examine this site's certificate carefully. Are you willing to accept this certificate for the purpose of identifying the Web Site MYSITE

Button -> Examine Certificate...

[  ] Accept this certificate permanently
[x] Accept this certificate temporarily for this session
[  ] Do not accept...

If a click in the "Examine Certificate" button shows:

Code:

Could not verify this certificate for unknown reasons.

Sometimes shows:

Code:

Issued To:
Common Name (CN) MYSITE
bla bla bla

other times shows:

Code:

Issued To:
Common Name (CN) localhost
bla bla bla

After accepting the certificate, the mails are either sent or rejected the same way I wrote in point 1 of INCOMING MAIL

3. If I select "Use secure connection->SSL" (Port 465) Thunderbird throws the following after a few seconds:

Code:

Sending of message failed.
The message could not be sent because connecting to SMTP server myserver.comfailed. The server may be unavailable or is refusing SMTP connections.

As an interesting fact, port 465 is closed.

Well, these are the cases

 

What are the outputs of

Code:

netstat -tap

and

Code:

iptables -L

?

 

Netstat and iptables

netstat -tap

Code:

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 localhost:2208          *:*                     LISTEN     8820/hpiod
tcp        0      0 *:7010                  *:*                     LISTEN     16527/nxagent
tcp        0      0 *:mysql                 *:*                     LISTEN     31881/mysqld
tcp        0      0 *:netbios-ssn           *:*                     LISTEN     4567/smbd
tcp        0      0 *:www                   *:*                     LISTEN     6086/apache2
tcp        0      0 *:webmin                *:*                     LISTEN     21962/perl
tcp        0      0 *:81                    *:*                     LISTEN     4776/ispconfig_http
tcp        0      0 *:ftp                   *:*                     LISTEN     23734/proftpd: (acc
tcp        0      0 myserver.local:domain       *:*                     LISTEN     4963/named
tcp        0      0 localhost:domain        *:*                     LISTEN     4963/named
tcp        0      0 localhost:ipp           *:*                     LISTEN     29168/cupsd
tcp        0      0 *:smtp                  *:*                     LISTEN     23194/master
tcp        0      0 localhost:953           *:*                     LISTEN     4963/named
tcp        0      0 *:https                 *:*                     LISTEN     6086/apache2
tcp        0      0 *:microsoft-ds          *:*                     LISTEN     4567/smbd
tcp        0      0 localhost:2207          *:*                     LISTEN     8823/python
tcp        0      0 localhost:57756         localhost:ssh           ESTABLISHED16508/nxssh
tcp6       0      0 *:imaps                 *:*                     LISTEN     18748/couriertcpd
tcp6       0      0 *:7010                  *:*                     LISTEN     16527/nxagent
tcp6       0      0 *:pop3s                 *:*                     LISTEN     18653/couriertcpd
tcp6       0      0 *:pop3                  *:*                     LISTEN     18593/couriertcpd
tcp6       0      0 *:imap2                 *:*                     LISTEN     18698/couriertcpd
tcp6       0      0 *:domain                *:*                     LISTEN     4963/named
tcp6       0      0 *:ssh                   *:*                     LISTEN     4601/sshd
tcp6       0      0 *:smtp                  *:*                     LISTEN     23194/master
tcp6       0      0 ip6-localhost:953       *:*                     LISTEN     4963/named
tcp6       0   3268 ::ffff:10.20.14.76%:ssh dsl-189-164-12-234:1882 ESTABLISHED31832/sshd: myuser [pr
tcp6       0      0 localhost:ssh           localhost:57756         ESTABLISHED16509/sshd: myuser [pr

iptables -L (with sudo)

Code:

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

iptables -L (without sudo, I mean with myuser)

Code:

iptables v1.3.6: can't initialize iptables table `filter': Permission denied (you must be root)
Perhaps iptables or your kernel needs to be upgraded.

Thanks again!!

 

Mail Problems

Falko,

I am having the same problem.

I get the 'Bounce' message (see attached file 'bounce.txt') when I send messages to hotmail.

Mydestination reads : -

Code:

/etc/postfix/main.cf.

I have checked & my IP is on the 'Black-List' (see attached file 'blacklist.txt' - some of the sites are in a foreign language and I can't even read the reason for being placed on there). How do I remove it/get it removed? How did it get there? One suggestion is because I have a Dynamic IP address.

I am a subscriber to DynDNS.com as a result of having a dynamic IP address. Can I use this facility to prevent being blocked?

My ISP does not block port 25.

How do I fix the problem??

Please help.