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

[grosas]

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)

:confused: 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


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


:confused: 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

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:

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:

# 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:

"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:

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__________

[grosas]

My netstat -tap shows thw following:

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

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:

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

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.

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


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.

[falko]

mydestination should read
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.

[grosas]

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...

[grosas]

Does this means that port 25 is open?

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

[falko]

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

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? 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.


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

[grosas]

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

[grosas]

:cool: 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.

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

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

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

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


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.

[grosas]

:cool: 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...:mad:

[falko]

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

[grosas]

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

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"

[grosas]

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?

[falko]

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

[grosas]

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?

[falko]

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

[grosas]

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 :(

[grosas]

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

These are the cases using Thunderbird:

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

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

options is selected, Thunderbird returns

Connection to server myserver.com timed out

:confused: 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:

"Mail server does not support secure authentication"

:confused: 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
:confused: 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.

<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:

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:

Could not verify this certificate for unknown reasons.

Sometimes shows:

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

other times shows:

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:

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

[falko]

What are the outputs of netstat -tap and iptables -L?

[grosas]

netstat -tap


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)


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)
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!!

[Linocks]

Falko,

I am having the same problem.

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

mydestination should read
mydestination = /etc/postfix/local-host-names in /etc/postfix/main.cf.

Mydestination reads : -

/etc/postfix/main.cf.

Also make sure that your server isn't blacklisted ( http://www.mxtoolbox.com/blacklists.aspx)

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 (http://www.five-ten-sg.com/blackhole.php?ip=81.98.79.109&Search=Search) 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?

and that your ISP doesn't block port 25.

My ISP does not block port 25.

How do I fix the problem??

Please help.:confused:

[falko]

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 : -

/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 (http://www.five-ten-sg.com/blackhole.php?ip=81.98.79.109&Search=Search) 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.:confused:
You are sending from a dynamic IP address:

<er0n@msn.com>: host mx3.hotmail.com[65.54.244.72] said: 550 DY-001 Mail
rejected by Windows Live Hotmail for policy reasons. We generally do not
accept email from dynamic IP's as they are not typically used to deliver
unauthenticated SMTP e-mail to an Internet mail server.
http://www.spamhaus.org maintains lists of dynamic and residential IP
addresses. If you are not an email/network admin please contact your
E-mail/Internet Service Provider for help. Email/network admins, please
visit http://postmaster.live.com for email delivery information and support
(in reply to MAIL FROM command)Almost all dynamic IP addresses are blacklisted nowadays.
You could relay your mails through another mail server: http://www.howtoforge.com/postfix_relaying_through_another_mailserver

[Linocks]

Almost all dynamic IP addresses are blacklisted nowadays.
You could relay your mails through another mail server: http://www.howtoforge.com/postfix_relaying_through_another_mailserver

I started to follow the howto as above but when I entered the command

chown root:root /etc/postfix/sasl_passwd

I got the following message
chown: cannot access `/etc/postfix/sasl_passwd': No such file or directory

What went wrong:confused:

I have followed the 'Howto' for the Ubuntu Gutsy Server Setup.

I was logged in as root and in the directory '/home/user1'. All preceeding commands went in without reporting any errors/complaining (if it complained it wasn't noticeable).:o

Oops!! Missed a command echo "smtp.example.com someuser:howtoforge" > /etc/postfix/sasl_passwd

Doh!! It seems to have been configured without complaining. Now for a test!!

[Linocks]

Success :D

My mail is now being received by Hotmail.;)

[grosas]

Anyone can tell my what's wrong with the output of my netstat -tap and iptables -L commands? pleaaase!!!!!!!!! (T_T) :'(

[falko]

Anyone can tell my what's wrong with the output of my netstat -tap and iptables -L commands? pleaaase!!!!!!!!! (T_T) :'(
The output is ok, so I'm not sure where the problem is... :(

[grosas]

Ok, Falko thank you very much anyway.

Well, let's supposing I did all tutorial steps the right way and let's supposing all my ports are open and anything in my server is right , what could be wrong?

I'm in a NAT, so, I have a 10.100.1.27 local IP and an external IP (just for my server), so I can connect to my server with such external IP.

I have one domain configured in my server (ie. myserver.com), I don't use ISPConfig, but I installed it when I followed the tutorial.

The MX settings of my housing service provider (HSP) or something like that?
it could be a problem with my HSP?
What can I ask to my HSP to know that?

Thanks, really thanks in advance.