restrict outgoing mail with postfix
 

Hi,

We currently have 2 linux email servers, which we want to merge into one. They are running RHEL5, Dovecot for IMAP/POP, and SMTP i assume is running through Postfix (Sorry, I inherited these and my Linux skills that great!). These are used for internal email only.

Both servers are setup so only certain users can send to non-trusted domains (config is the same as this link - http://www.postfix.org/RESTRICTION_CLASS_README.html, bottom of the page). One server works, the other doesn't. I have trolled a lot of forums, but cannot find an answer.

I believe it is using postfix, as if i remove the line "permit_mynetworks" from "smtpd_recipient_restrictions" in the main.cf, all email stops working.

My assumption is that username/email is not finding a match in the /etc/postfix/restricted_senders file, but i have tried different possibilities with no success. Is there a log file i can check which shows postfix errors or email traces?

Any thoughts? I can post some configs if you need them.

Thanks in advance.

Are both servers running different domains? Are they using mysql database or linux users? What is the pop/smtp software running.

Further details will be required before anything can be concluded. Also posting main.cf of both servers may help.

Regards,
Gorav

Hi gorav,

main.cf files are attached for both servers.

They are on different domains. The server that isn't working was connected to Active Directory at some point - I'm not sure if it still is or not.

The logins are all linux users.

Dovecot is used for POP/IMAP. In regards to SMTP, I assume it is using postfix on both servers. As mentioned before, I removed the line "permit_mynetworks" from "smtpd_recipient_restrictions" in the main.cf and all emails were bouncing, which points me to postfix controlling the SMTP.

Thanks

bump.

Can anyone assist with this? or point me in a direction for diagnosis?

Thanks

Error log
 

What error does it show in /var/log/maillog?

Also, permitting emails for mynetwork is a bad idea as it becomes open relay host which can usually is undesirable.

My email id is gorav(at)impactservices(dot)in

Hi gorav,

The maillog has some detail. Here are the extracts from my test emails:

WORKING
Sep 27 00:51:08 sendmail postfix/smtpd[15189]: connect from gm716pc1[10.110.12.151]
Sep 27 00:51:08 sendmail postfix/smtpd[15189]: NOQUEUE: reject: RCPT from gm716pc1[10.110.12.151]: 554 5.7.1 <innaloo312@*****.biz>: Sender address rejected: Access denied; from=<innaloo312@*****.biz> to=<*****@bigpond.com> proto=SMTP helo=<GM716PC1>
Sep 27 00:51:08 sendmail postfix/smtpd[15189]: disconnect from gm716pc1[10.110.12.151]


NOT WORKING
Sep 26 14:34:52 dovecot postfix/smtpd[7236]: connect from gm716pc1[10.110.12.151]
Sep 26 14:34:52 dovecot postfix/smtpd[7236]: CDA6CB50043: client=gm716pc1[10.110.12.151]
Sep 26 14:34:52 dovecot postfix/cleanup[7204]: CDA6CB50043: message-id=<665A65D5EA7A40F6BB71E011BDB9EF12@GM716PC1>
Sep 26 14:34:52 dovecot postfix/qmgr[30426]: CDA6CB50043: from=<test999@*****.biz>, size=1331, nrcpt=1 (queue active)
Sep 26 14:34:52 dovecot postfix/smtpd[7236]: disconnect from gm716pc1[10.110.12.151]
Sep 26 14:34:52 dovecot postfix/smtp[7353]: CDA6CB50043: to=<*****@bigpond.com>, relay=exchange.***.local[10.110.1.5]:25, delay=0.15, delays=0.06/0/0/0.09, dsn=2.6.0, status=sent (250 2.6.0 <665A65D5EA7A40F6BB71E011BDB9EF12@GM716PC1> Queued mail for delivery)
Sep 26 14:34:52 dovecot postfix/qmgr[30426]: CDA6CB50043: removed
Sep 26 14:34:53 dovecot dovecot: IMAP(test999.*****.biz): Effective uid=758, gid=504, home=/home/*****/homes/test999
Sep 26 14:34:53 dovecot dovecot: IMAP(test999.*****.biz): maildir: data=/home/*****/homes/test999/Maildir
Sep 26 14:34:53 dovecot dovecot: IMAP(test999.*****.biz): maildir: root=/home/*****/homes/test999/Maildir, index=/home/*****/homes/test999/Maildir, control=, inbox=
Sep 26 14:34:53 dovecot dovecot: imap-login: Login: user=<test999.*****.biz>, method=PLAIN, rip=::ffff:10.110.12.151, lip=::ffff:10.110.1.6
Sep 26 14:34:53 dovecot dovecot: IMAP(test999.*****.biz): Disconnected: Logged out


Note that I put ***** to blank out some detail.


I also found this in the log of the server that isnt working:

Sep 26 14:14:24 dovecot postfix/smtpd[6091]: warning: database /etc/postfix/restricted_senders.db is older than source file /etc/postfix/restricted_senders
Sep 26 14:14:24 dovecot postfix/smtpd[6091]: warning: database /etc/postfix/local_domains.db is older than source file /etc/postfix/local_domains

Is this the cause of the issue?

Thanks

...bump...

Can anyone help at all?

You may need professional help.