Postfix sending to A not MX
David
david at daku.org
Sun Feb 27 16:33:15 UTC 2022
At 06:02 PM 2/25/2022, you wrote:
>At Fri, 25 Feb 2022 16:46:28 -0800 "Ubuntu user technical support,?
>not for general discussions" <ubuntu-users at lists.ubuntu.com>
>wrote: > > Folks > > I'm running Ubuntu server 20.04.3. I find that
>Postfix is trying to > send mail to the destination 'a' record and
>obviously failing. The > 'dig mx' command shows actual MX values
>for sonic.net. What is the setting for myorigin in
>main.cf? $mydomain or $myhostname? If the MX record is for
>$mydomain, but if the message is from $myhostname, postfix will try
>to find a mx record for $myhostname and not $mydomain... > > Can you
>advise? > > The case in question is sending mail to me at my ISP
>from a Ubuntu > server located outside that ISP. The file
>/var/log/mail.log shows: > (I have obscured real user and domain
>names, user 'quser', and domain 'qdomain' > The destination of the
>email is also obscured, and is 'qtarget'). > > Feb 25 17:12:59
>qserver postfix/postfix-script[564854]: starting the > Postfix mail
>system > Feb 25 17:12:59 qserver postfix/master[564856]: daemon
>started -- > version 3.4.13, configuration /etc/postfix > Feb 25
>17:13:36 qserver postfix/pickup[564857]: 3F8F6300DB8: uid=1000 >
>from=<quser> > Feb 25 17:13:36 qserver postfix/cleanup[564944]:
>3F8F6300DB8: >
>message-id=<20220226001336.3F8F6300DB8 at qserver.quser.org> > Feb 25
>17:13:36 qserver postfix/qmgr[564858]: 3F8F6300DB8: >
>from=<quser at quser.org>, size=372, nrcpt=1 (queue active) > Feb 25
>17:14:06 qserver postfix/smtp[564948]: connect to >
>sonic.net[209.204.190.64]:25: Connection timed out > Feb 25 17:14:06
>qserver postfix/smtp[564948]: 3F8F6300DB8: > to=<qtarget at sonic.net>,
>relay=none, delay=30, delays=0.02/0.02/30/0, > dsn=4.4.1,
>status=deferred (connect to sonic.net[209.204.190.64]:25: >
>Connection timed out) > Feb 25 17:15:11 qserver
>postfix/pickup[564857]: 552E5300E01: uid=0 > from=<root at qserver> >
>Feb 25 17:15:11 qserver postfix/cleanup[564944]: 552E5300E01: >
>message-id=<20220226001511.552E5300E01 at qserver.quser.org> > Feb 25
>17:15:11 qserver postfix/qmgr[564858]: 552E5300E01: >
>from=<root at qserver>, size=3132, nrcpt=1 (queue active) > Feb 25
>17:15:11 qserver postfix/local[565301]: 552E5300E01: >
>to=<quser at localhost>, orig_to=<alert at quser.org>, relay=local, >
>delay=0.02, delays=0.01/0.01/0/0.01, dsn=2.0.0, status=sent >
>(delivered to command: /usr/bin/procmail -a "$EXTENSION") > Feb 25
>17:15:11 qserver postfix/qmgr[564858]: 552E5300E01: removed > Feb 25
>17:15:11 qserver postfix/postfix-script[565315]: stopping the >
>Postfix mail system > Feb 25 17:15:11 qserver
>postfix/master[564856]: terminating on signal 15 > Feb 25 17:15:12
>qserver postfix/postfix-script[565946]: warning: > unable to create
>missing queue directories > Feb 25 17:15:12 qserver
>postfix/postfix-script[565966]: warning: > symlink leaves directory:
>/etc/postfix/./makedefs.out > Feb 25 17:15:12 qserver
>postfix/postfix-script[566139]: starting the > Postfix mail system >
>Feb 25 17:15:12 qserver postfix/master[566141]: daemon started -- >
>version 3.4.13, configuration /etc/postfix > Feb 25 17:15:13 qserver
>dovecot: master: Warning: Killed with signal > 15 (by pid=566149
>uid=0 code=kill) > Feb 25 17:15:14 qserver dovecot: master: Dovecot
>v2.3.7.2 (3c910f64b) > starting up for imap, pop3, lmtp (core dumps
>disabled) > Feb 25 17:20:12 qserver postfix/qmgr[566143]:
>3F8F6300DB8: > from=<quser at quser.org>, size=372, nrcpt=1 (queue
>active) > Feb 25 17:20:12 qserver postfix/qmgr[566143]:
>17C3B3010BF: > from=<quser at quser.org>, size=368, nrcpt=1 (queue
>active) > Feb 25 17:20:42 qserver postfix/smtp[567014]: connect to >
>sonic.net[209.204.190.64]:25: Connection timed out > Feb 25 17:20:42
>qserver postfix/smtp[567010]: connect to >
>sonic.net[209.204.190.64]:25: Connection timed out > Feb 25 17:20:42
>qserver postfix/smtp[567014]: 17C3B3010BF: > to=<qtarget at sonic.net>,
>relay=none, delay=1129, > delays=1099/0.02/30/0, dsn=4.4.1,
>status=deferred (connect to > sonic.net[209.204.190.64]:25:
>Connection timed out) > Feb 25 17:20:42 qserver
>postfix/smtp[567010]: 3F8F6300DB8: > to=<qtarget at sonic.net>,
>relay=none, delay=426, delays=396/0.03/30/0, > dsn=4.4.1,
>status=deferred (connect to sonic.net[209.204.190.64]:25: >
>Connection timed out) > > > > > > My /etc/postfix/main.cf is
>enclosed below; > > > > alias_database =
>hash:/etc/aliases > alias_maps =
>hash:/etc/aliases > append_dot_mydomain = no >
>biff = no >
>command_directory = /usr/sbin >
>compatibility_level = 2 >
>data_directory = /var/lib/postfix >
>debug_peer_level = 2 >
>debugger_command = >
>PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin > ddd
>$daemon_directory/$process_name $process_id & sleep 5 >
>default_privs = nobody >
>disable_dns_lookups = yes >
>home_mailbox = Maildir/ >
>inet_interfaces = all >
>inet_protocols = ipv4 >
>local_recipient_maps = proxy:unix:passwd.byname
>$alias_maps > mail_owner = postfix >
>mailbox_command = /usr/bin/procmail -a
>"$EXTENSION" > mailbox_size_limit = 0 >
>mua_client_restrictions = permit_sasl_authenticated,
>reject > mua_helo_restrictions = permit_mynetworks, >
>reject_non_fqdn_hostname, reject_invalid_hostname, permit >
>mua_sender_restrictions = permit_sasl_authenticated,
>reject > mydestination = localhost.$mydomain
>localhost $mydomain > mydomain =
>quser.org > myhostname =
>qserver.quser.org > mynetworks =
>127.0.0.0/8 192.168.0.0/16 > 10.0.0.0/8 172.16.0.0/12 >
>myorigin = $mydomain >
>queue_directory = /var/spool/postfix >
>readme_directory = no >
>recipient_delimiter = + >
>relayhost = >
>smtp_tls_CApath = /etc/ssl/certs >
>smtp_tls_security_level = may >
>smtp_tls_session_cache_database =
>btree:${data_directory}/smtp_scache >
>smtpd_banner = $myhostname ESMTP $mail_name
>(Ubuntu) > smtpd_relay_restrictions = permit_mynetworks >
>permit_sasl_authenticated defer_unauth_destination >
>smtpd_tls_cert_file =
>/etc/ssl/certs/ssl-cert-snakeoil.pem >
>smtpd_tls_key_file =
>/etc/ssl/private/ssl-cert-snakeoil.key >
>smtpd_tls_security_level = may >
>unknown_local_recipient_reject_code = 550 >
>virtual_alias_domains = qserver.quser.org >
>virtual_alias_maps =
>hash:/etc/postfix/virtualusers > > -- Robert Heller --
>Cell: 413-658-7953 GV: 978-633-5364 Deepwoods Software --
>Custom Software Services http://www.deepsoft.com/ -- Linux
>Administration Services heller at deepsoft.com -- Webhosting
>Services
>-- ubuntu-users mailing list ubuntu-users at lists.ubuntu.com Modify
>settings or unsubscribe at:
>https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
For some reason, all mail from ubuntu-users arrives without
new-lines. But I'll try to respond to what I think was the question.
I enclosed a copy of main.cf in the mail, so you can see what
myorigin is. However, I don't think that 'myorigin' had anything to
do with it, since I'm actually sending to a user at
'nobody at microsoftsupport.com'.
The mail I get back from Postfix is:
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
<nobody at microsoftsupport.com>: unable to look up host microsoftsupport.com: No
address associated with hostname
Please note that the MX record for 'microsoftsupport.com' (if you do a dig) is
microsoftsupport-com.mail.protection.outlook.com
So why isn't postfix trying the mail address instead of the original
host address?
More information about the ubuntu-users
mailing list