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Questions tagged [postfix]

Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: `postconf -n` (non-default content of main.cf) and `postconf -M` (content of master.cf)

Postfix is a mail transfer agent (MTA) that supports IPv6, DNSBL, SMTP AUTH (SASL), TLS and various database backend.

Postfix was written by Wietse Venema in 1997 and first released in December 1998 as IBM Secure Mailer.

It was designed to be highly secure and configurable, and is a drop-in replacement for , with much simpler configuration syntax.

The software was also formerly known as VMailer.

6398 questions
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Spam mail forwarded through my server using valid user

I am getting "Undelivered Mail Returned to Sender" messages. The relevant mail messages are being forwarded using a valid user (mike@proactech.com) on my server (server1.nbicharts.com). I control that email address, so it is not me that's doing…
user1142052
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Postfix omits realm (@domain) when checking for smtpd pam+mysql authentication

I've trying to configure Postfix so users can send email through SMTP having a username and password. And I'm trying to store credential within a MySQL database. I've taken the path of saslauthd and pam and I'm stuck in the midway. Enabling the pam…
Mehran
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Logwatch postfix report. Where does this "Deferrals" come from and how to stop it?

I'm using logwatch to monitor the logs on my server and I'm trying to make sense out of the postfix report. (See the report below.) By looking at /var/log/mail.log I saw that this mail seems to be bouncing for a long time. How can I stop this? Also…
fabianmoronzirfas
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Postfix - rate limit outgoing concurrent connections to one machine/ip

I need to limit postfix outgoing connections for specific mailservers, but it seems to me that posfix's limiting is based on domains? What if there is one mailserver for more domains? I tried to find out what "destination" means in postfix's tuning…
xtc
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dovecot/ postfix make me two different folder same user (user; user@domain)

I had some problem with the Dovecot/Postfix/LDAP/SASL config files: The LDAP query, SASL config its work but my problem is postfix and the dovecot: When i first login the outlook/thunderbird/etc.. it make username folder under the /var/mail, if i…
hunstryker
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Mail Server Memory buffer error

From time to time, my mail server stops sending any new mails. When this happened, I find the below error log, Jun 22 23:10:18 myserver saslauthd[3967]: DEBUG: auth_pam: pam_authenticate failed: Memory buffer error Jun 22 23:10:18 myserver…
MohammedSimba
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How to stop a loop I have introduced in a transitional postfix-spamassassin-dovecot setup

I am at the early stages of the steep email handling learning curve, gentleness appreciated :-). I have a setup with postfix and dovecot. I am trying to migrate my email server (domain example.com) from my house to an instance running somewhere else…
copper.hat
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How to make Postfix skipping some recipient's hosts as unreachable?

I would be really happy to learn how to make Postfix to "remember" that certain host is unreachable at the moment, so it would be good if we didn't perform any new connection attempts to this host for a while. I know Postfix is following exponential…
Volodymyr Melnyk
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Postfix completely ignores relayhost setting in main.cf

I am having trouble sending email to my relay host. All mail is being directly delivered. postconf -n: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no config_directory =…
moodah
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Explain user@domain format of postfix $virtual_mailbox_maps parameter value

I am trying to setup a mail server using this article. Basically using postfix & dovecot. I have a test setup which works, but I don't understand some (a lot) of stuff and am trying to rectify that before migrating. Of the many things, this is the…
copper.hat
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postfix alias maildir delivering to ~user/Maildir/ instead of ~user/Maildir/alias/

My environment: # cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.6 (Santiago) # rpm -q postfix postfix-2.6.6-6.el6_5.i686 # I switched home_mailbox from Mailbox to Maildir/: # postconf -n | grep home_mailbox home_mailbox =…
alexus
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Mail marked as spam (Gmail/Hotmail): IP not on blacklist, DKIM Valid, SPF Valid and DMARC valid

I'm trying to send mail from my own domain (which is 15 days old now) but I'm having some troubles. Check the following mail body: Delivered-To: ------@gmail.com Received: by 10.25.89.200 with SMTP id n191csp1613325lfb; Mon, 15 Jun 2015…
user1226868
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Dovecot reports no SASL authentication mechanisms

On my way to setup a mail server with Postfix and Dovecot on Ubuntu, I can now send mails to other domains. However, I cannot receive from others. In the logs it reads Jun 14 09:34:35 postfix/smtpd[27426]: connect from…
Andreas Hahne
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postfix fatal: specify a password table via the `smtp_sasl_password_maps' configuration parameter

I'm using webmin and postfix to send emails, and I can't send emails, I checked the logs in the file: /var/log/maillog anf found the following error: fatal: specify a password table via the `smtp_sasl_password_maps' configuration parameter how can…
user1928596
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Postfix header stating wrong IP

I am using Postfix 2.11.3 on Debian 8.0 I configured Postfix to run multiple instances (3), one for each public IP connected to our server in order to balance outgoing traffic depending on the service. I configured DKIM and SPF for all subdomains (1…
Andrea Olivato
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