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" (content of main.cf) and/or "postconf -M" (content of master.cf)

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-1
votes
1answer
57 views

postfix apparently relay email

I have read as many documents as I could understand about tuning postfix main.cf parameters, but still get some external email relayed. Here is a typical example in /var/log/mail.log: Mar 6 06:26:13 ...
0
votes
2answers
123 views

Postix or Dovecot debug log for Maildir folder, Virtual user mail folder owner and permission

I'm no able to find a complete tutorial about Maildir and the folders where reside owner and permissions if there's any and you already found it , please share. Anyway I wonder if there is a way to ...
0
votes
1answer
54 views

Recomendations for this mail server setup?

EMAIL SERVER SETUP Hey, its my first time using serverfault but I hope the community can help. I am trying to build a secure email system using Linux, Postfix, Dovecot and MySQL. I have read on ...
0
votes
2answers
144 views

email sending speed - how to improve

I am maintaining a server to send email mailings (no spam, of course). The current speed of this machine is approx. 2000 emails per hour. (edit: actually I did a test mailing today, removing the ...
4
votes
1answer
143 views

how do I set up two smtp ports for postfix?

A CentOS 7 server with postfix, dovecot, and mailx needs to accommodate mail being sent through port 465 and received through port 25. What specific syntax and files need to be changed in order to ...
1
vote
1answer
80 views

Understanding Postfix Mail Log

Recently I checked my mail log and found a lot of messages like this (some cipher text have been truncated): Feb 23 11:57:42 postfix/smtpd[32451]: initializing the server-side TLS engine Feb 23 ...
1
vote
1answer
103 views

Increase timeout for Postfix/Cyrus “Command time limit exceeded”?

I have an old OS X Server 10.4.x running Postfix 2.1.5 which is configured to use cyrus as mailbox transport. Here's postconf -n: # postconf -n alias_maps = ...
1
vote
1answer
36 views

If I create a virtual email alias that forwards a lot of spam email, is my IP at risk of blacklisting or the originating IP address? [duplicate]

A scenario of this would be something like a domain called domain.com has a mailserver set up that forwards all email sent to info@domain.com to person@gmail.com. If someone sends a lot of spam to ...
0
votes
2answers
95 views

postfix mails (works) to all but my domain on debian

I have set up a redmine server that I got from turnkey linux. Mail more-or-less works out of the box. I can mail to anyone that is not in my domain. Let me explain: If I run the mail command from ...
1
vote
1answer
61 views

Allowing Postfix Relaying For Certain Hosts [duplicate]

I have Postfix setup in a test environment, segregated from our LAN, and relaying for hosts in the test environment. Originally, I had all outbound email funneling through procmail and into a single ...
1
vote
0answers
28 views

Applying filter on mail from specific subnet in postfix [duplicate]

I'm trying to get the following to work: We have a postfix relay on the edge of our network, accepting all mail from our internal LAN & DMZ. What we are trying to get to work is limiting the ...
0
votes
0answers
30 views

Exchange with Postfix MX for technical accounts in same DOMAIN

I have organization configured with Exchange 2007 server with many technical accounts. I would like to migrate technical account to Postfix server with same domain At the moment my structure is: ...
0
votes
1answer
27 views

opendkim to sign all '*' users in a domain

How do you get opendkim to sign for all users in a domain? *@exmailer.com exmailmap in the signing table is not working for me. error: opendkim[1565]: 573D4A0D3D: no signing table match for ...
4
votes
1answer
59 views

Roundcube sends e-mails without subject

I have recently set up a mail server that consists of postfix and dovecot. Yesterday I added nginx and roundcube to the mix. SPF, DKIM, DMARC, rDNS records are all done. Gmail treats my mail as valid ...
6
votes
1answer
64 views

postfix performance with lists in main.cf

For defining a list of items to assign to many different options in postfix, you can either use a comma separated list like this: relay_domains = example.com,example.net,example.org or a hash map ...
0
votes
1answer
63 views

CentOS email setup for Wordpress

I am moving an old Wordpress install to a new CentOS LEMP stack VPS. I want to set up email for the new VPS. It came with sendmail installed by default but I find it to be overkill. I just need a ...
1
vote
0answers
57 views

Postfix not following MX, local delivery LDAP

Before explaining the problem, this is the setup: We run 5 servers, 2 in Montevideo [Uruguay], 3 in the US, on each server we have clients (domains, mail accounts, and obviously local logins) the LDAP ...
-1
votes
2answers
88 views

Postfix, I'm receiving a lot of undelivered mails (logs inside)

Some days I receive a lot of Undelivered emails, it's like my server is used as relay. But I don't know if that's only backscatter emails or my server is really used as a relay. Here is what I found ...
1
vote
1answer
58 views

Postfix [Courier, Maildir] Disable Quota

I set up Postfix under Debian Wheezy with MySQL and virtual users using this tutorial. Thunderbird is recently giving me alerts "You exceeded your mail quota" and saving/moving emails is denied. The ...
1
vote
1answer
82 views

Postfix - relay locally generated mail but accept mail incoming from GApps for the same domain

I know the way to disable all local delivery is to remove the domain from "mydestination", which will cause all mail to be relayed through whatever relay I setup. But I want postfix to accept all mail ...
0
votes
1answer
125 views

Dovecot / Postfix / SASL: Connect to /var/run/dovecot/auth-client failed: Permission denied

Dovecot / Postfix configuration is not working properly on my server : after several checks, I understand that Imap services are operationnal using local or desktop clients Postfix is listening, ...
2
votes
1answer
114 views

SASL PLAIN authenticating with primary domain, but not with virtual domain

Postfix + dovecot and sasl. Works so far with 1 domain. Added a virtual domain. Incoming mail for this works. Outgoing however has SASL authentication failing. Why does it fail I don't know. ...
1
vote
0answers
14 views

Conditional rewrite Postfix headers [duplicate]

On my website I have a form that is send to me by e-mail once filled out. The form mails with its own email address but has a Reply-to to the people who have filled out the form. In Postfix I want to ...
1
vote
1answer
34 views

Two servers in domain but only one responsible for sending emails

I have two Debian servers: web.example.com - LAMP web server mail.example.com - mail server with postfix, dovecot and mysql based user directories, auth required Now I want to setup web.example.com ...
-1
votes
1answer
247 views

Dovecot SMTPD Sasl auth error: fatal: no SASL authentication mechanisms

I've googled this error and nothing I've read/tried works - anyone know what it is Error log: Feb 23 22:35:36 localhost postfix/smtpd[5278]: connect from localhost.localdomain[127.0.0.1] Feb 23 ...
0
votes
0answers
164 views

postfix with dovecot : fatal: no SASL authentication mechanisms

I setup a mail server using postfix and dovecot . I used pro linux system administration book by James Turnbull, but I got following error when try to test mail server with swaks command. swaks -tls ...
1
vote
4answers
63 views

Set up the right mx records for postfix/dovecot server

I recently set up a postfix/dovecot mail-server on my VPS (OVH), but for some reason I cannot receive e-mail through it. Is anyone able to check my DNS-records and my Postfix/dovecot configuration to ...
1
vote
1answer
38 views

postfix destination full/busy/error try another destination

Does anyone know if it is possible to setup postfix with a destination for a domain. If that destination (which is also running postfix) can't accept the mail because it's disk is full or it is ...
2
votes
2answers
68 views

PHP emails, Postfix and Message Queue

I've been running a web platform that needs to send a considerable amount of emails daily. At the implementation date I and my partner decided to setup Postfix on the server and use Swift Mailer class ...
0
votes
1answer
54 views

Can't login via IMAP after creating user via useradd command

I'm trying to create a new user (that can access email) with useradd. My command is useradd --shell /bin/bash --create-home --password <password> <username> However, I cannot login to ...
1
vote
0answers
29 views

Postfix, dovecot, postfixadmin - duplicated maildir [duplicate]

I've configured postfix with dovecot and postfix admin with mysql based user storage. I changed maildir to /var/mail /etc/dovecot/dovecot.conf: mail_location = ...
0
votes
3answers
72 views

How to force a own set of ciphers in Postfix 2.11?

I would like to force a own set of TLS cipher suites rather than use the Postfix built in ones. My desired set of ciphers is (taken from nginx configuration): ...
-2
votes
1answer
86 views

Postfix POP3 NOQUEUE: reject: RCPT error

I am getting an NOQUEUE: reject: RCPT error when trying to send mail via POP3 and Postfix (note: IMAP works fine). Feb 21 06:57:04 r2d2 dovecot: pop3(br@telecomm.com): Disconnected: Logged out ...
1
vote
2answers
127 views

Can't connect with telnet from external ip

I have a postfix server running on a kimsufi VPS, i installed roundcube on it, and everything is ok. The problem is, when i try to connect from another server, i have a timeout : telnet whys.fr 25 ...
5
votes
1answer
116 views

Postfix stops picking up mails at night

Our postfix system stops sending mails at night. Every night at 2am it stops picking up mails. The server is a monitoring server, which sends a lot of mails per day. /bin/mail drops the mails in the ...
1
vote
1answer
72 views

Postfix using virtual.db file instead of mysql table

I have specified virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf, but still I got errors like warning: hash:/etc/postfix/virtual is unavailable. open database ...
1
vote
1answer
84 views

How to disable SSLv3 in Postfix 2.11?

I just noticed (by some online check tools) that my mailserver may allow SSLv3 and updated my configuration. My current config in Postfix 2.11.2: # inbound smtpd_tls_security_level = may ...
0
votes
1answer
55 views

Spamassassin is conflicting with postifx

I am trying to install spamassassin. But it seems to be conflicting with POSTFIX. When I restart spamassassin I get the following error code: /usr/sbin/postconf: fatal: file /etc/postfix/master.cf: ...
0
votes
1answer
32 views

What happens to local email when user does not exist

I'm running a server with postfix to handle email sent from a php website. Email for the domain is handled by another server, however due to the fact that this domain name has been entered in ...
-1
votes
1answer
80 views

DOVECOT: Access denied

I am trying to set up a mail server following this tutorial: http://www.starbridge.org/spip/spip.php?article12#dovecot-sasl-lda-imap-et-sieve I cannot receive emails on my email client (thunderbird). ...
0
votes
1answer
44 views

How filter catchall email account based on recipient address [closed]

// Background info I am building a chrome plugin that forwards private messages from websites to your email and allows your email replies to be returned through the various sites private message ...
4
votes
2answers
140 views

postfix “User doesn't exist” but user does exist

I am having a strange situation which I could not find elsewhere. When I send mail to rcook on my local machine, I'm seeing this in the syslog: Feb 16 20:27:14 linode postfix/pickup[1305]: ...
0
votes
1answer
33 views

I guess that my mail server is unprotected and spammers are using my mail server to spam myself [duplicate]

Since I switch to my own mail server (I folowed this two tutorials: https://www.linode.com/docs/email/postfix/email-with-postfix-dovecot-and-mysql and ...
0
votes
1answer
28 views

localhost in postfix's mydestination

I noticed that many tutorials on the web specify the mydestination variable of postfix like this: mydestination = localhost, localhost.myhostname, myhostname, mydomain1.com, mydomain2.com Note: ...
2
votes
1answer
65 views

Postfix doesn't start on reboot

I'm on CentOS 7 and as far as I understand, all that is needed for Postfix to start on reboot is to run systemctl enable postfix.service However, that doesn't work for me. After a reboot, systemctl ...
1
vote
2answers
53 views

Is it safe to remove write permission from postfix main.cf?

While I track down what facility is re/setting mydomain to "local" I'd like turn main.cf into a read-only permissioned file. At present the permissions are 644, owned by root. Is that safe to do? ...
1
vote
1answer
46 views

Postfix SMTP recipient filter not filtering

I have setup Postfix with a list of blacklisted recipients, so that the Postfix server should not relay mail to them (smtpd_recipient_access parameter in main.cf). The addresses are properly listed ...
2
votes
1answer
30 views

Postfix replaces “from” when using simple filtering

I'm trying to configure Postfix (on a RHEL 6.5) to modify the content of incoming messages and forward the emails to a remote server. I used a Perl script piped to Postfix to modify the content, and ...
1
vote
1answer
29 views

smtpd_recipient_restrictions works but not always

I have POSTFIX set up to filter certain email addresses. The main.cf file contains: smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/blacklist, permit_mynetworks, ...
-1
votes
1answer
112 views

Postfix- Host or domain name not found - looking up wrong domain name

I want to know where i can configure the following. I want postfix to lookup the host: myexample.com, but instead it is looking up Host-Wordpress-01. Which is my digitalocean droplets name. ...