Virtual Users And Domains With Postfix, Courier And MySQL (Debian Etch)

[theMikeroy]

Hi =)

I used the awesome tut Falco's put up at:
http://www.howtoforge.com/virtual_us...ix_debian_etch


I'm getting a couple of weird errors I cant' seem to track down using this tutorial.

The host is on Xen (it's a DomU), if that makes a difference.

For some reason my forwarding stopped. It was working just fine, but it seems to have died about a week ago and I've been trying to troubleshoot it since.

Here are some clips from the logs: (i replaced the actual domain with *domain.tld* for this forum)

mail postfix/smtp[2538]: fatal: valid hostname or network address required in server description: *domain.tld*

I get that ALOT... (thousands in mail.log)
also:

postfix/qmgr[1438]: warning: mail for [127.0.0.1]:10024 is using up 19997 of 20000 active queue entries
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: you may need to reduce amavis connect and helo timeouts
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: so that Postfix quickly skips unavailable hosts
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: you may need to increase the main.cf minimal_backoff_time and maximal_backoff_time
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: so that Postfix wastes less time on undeliverable mail
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: you may need to increase the master.cf amavis process limit
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: please avoid flushing the whole queue when you have
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: lots of deferred mail, that is bad for performance
Jul 10 23:54:43 mail postfix/qmgr[1438]: warning: to turn off these warnings specify: qmgr_clog_warn_time = 0

Ok, so they tried to send out a mass mailer and it filled the queue... anyway I can empty that without loosing the mail?


And this may be of interest... It's hard to catch unique errors in the logs because they clog up so fast, but I notice this:

Jul 10 23:40:59 mail postfix/master[1432]: warning: /usr/lib/postfix/smtp: bad command startup -- throttling

The client using this server is hosting 2 domains on it and forwarding them. (if that helps)

I'm sure I've missed something really silly and trivial here...

Any suggestions are much appreciated =)

Thanks!

[falko]

What are the outputs of

postfix check

and

postconf -n

?

Can you check if your domain can be resolved:

dig domain.tld

[theMikeroy]

Hey Falco, thanks for the reply

mail:/var/log# postfix check
mail:/var/log#

I suppose that means the check was ok?

I should have posted the postconf -n earlier, my bad... here we go:

mail:/var/log# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
inet_interfaces = all
mailbox_size_limit = 0
mydestination = mail.domain1.com, mail.domain2.com, localhost, localhost.localdomain
myhostname = mail.domain1.com
mynetworks = 127.0.0.0/8
myorigin = /etc/mailname
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
receive_override_options = no_address_mappings
recipient_delimiter = +
relayhost =
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_loglevel = 1
smtpd_use_tls = yes
transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_uid_maps = static:5000


the dig definately goes where it should, i've got both A and PTR records working just splendidly.

I should note that the server has 2 ip's and 2 domains pointed to each IP, and A and PTR records for each working just fine.

Also, I edited the post, but I can't seem to connect via POP from outside, however I can telnet to the pop port from localhost as the tutorial advises to check if the pop server is responding:

mail:/var/log# telnet localhost pop3
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
+OK Hello there.
quit
+OK Better luck next time.
Connection closed by foreign host.

and

mail:/var/log# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 mail.domain1.com ESMTP Postfix (Debian/GNU)
ehlo mail.domain1.com
250-mail.domain1.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

*edit*
I can connect to pop3 from outside, but not port 25:

$ telnet xx.xx.xx.xx pop3
Trying xx.xx.xx.xx...
Connected to mail.domain1.com.
Escape character is '^]'.
+OK Hello there.
quit



Thanks for the help, you're the mail master =)

[falko]

Originally Posted by theMikeroy

*edit*
I can connect to pop3 from outside, but not port 25:

$ telnet xx.xx.xx.xx pop3
Trying xx.xx.xx.xx...
Connected to mail.domain1.com.
Escape character is '^]'.
+OK Hello there.
quit

Do you host the server at home or in your office? If so, you should ask your provider if they block port 25.

[theMikeroy]

It's totally not port 25 bring blocked.

I'm doing it from the office, we're an ISP and I'm the sysadmin who controls the firewall =)

The crux of the issue, i think, falls in the following errors:
# tail mail.warn
Jul 12 15:14:50 mail postfix/smtp[19440]: fatal: valid hostname or network address required in server description: mail.domain1.com
Jul 12 15:14:51 mail postfix/master[20465]: warning: process /usr/lib/postfix/smtp pid 19440 exit status 1
Jul 12 15:14:51 mail postfix/master[20465]: warning: /usr/lib/postfix/smtp: bad command startup -- throttling
Jul 12 15:14:51 mail postfix/qmgr[20470]: warning: private/smtp socket: malformed response
Jul 12 15:14:51 mail postfix/qmgr[20470]: warning: transport smtp failure -- see a previous warning/fatal/panic logfile record for the problem description

and from mail.log:

Jul 12 15:15:53 mail postfix/error[19537]: 8A2B8173245: to=<*user*@domain2.com>, relay=none, delay=185543, delays=185543/0.05/0/0.04, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to 127.0.0.1[127.0.0.1]: Connection refused)

I can't seem to find much help on these issues when i search for 'fatal: valid hostname or network address required in server description'. The 2nd google option is this thread, actually =\

[falko]

What's in /etc/mailname, and what's the output of

netstat -tap

?