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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4
votes
0answers
858 views

opendkim fail | bad RSA signature | verification failed unprotected key

I have fully manageable VPS running Ubuntu 14.04 which hosts websites for several domains. Recently I have tried to add DKIM signatures to avoid spam filters. I've followed ubuntu-postfix-dkim ...
3
votes
0answers
41 views

Postfix reject_rbl_client Blacklists Not Working

I have a mail server (iRedMail) that uses Postfix. I've been getting a lot of spam, so I modified the /etc/postfix/main.cf file and have the smtpd_recipient_restrictions set to this: ...
3
votes
0answers
64 views

Configure mailgun as relayhost on top of existing postfix server already using sasl

I might be barking at the wrong tree completely here, but I'll ask anyway. I've followed a tutorial to setup a Mailserver on ubuntu 14.04 with postfix, dovecot and mysql. Now I have setup mailgun to ...
3
votes
0answers
43 views

I need help trying to authenticate with AD from my linux machine

I am not experienced in this, so there might be some points that I am missing. Initially I tried to setup Cyrus Mail w/ SASL for AD authentication. After several tries, it failed to work. I switched ...
3
votes
0answers
34 views

Early mail rejection with Mailman in Postfix

I have a Postfix installation on a single machine which is the sole final mail destination for: The hostname of the machine (mail.example.org) and localhost Mailman lists on lists.example.org A ...
2
votes
0answers
21 views

Postfix: deleting emails with recipient not in virtual_alias_maps

I'm getting a lot of spam for recipients that don't exist on my domain. I'm forwarding email on this domain to various external addresses for my family by using virtual_alias_maps. To prevent these ...
2
votes
0answers
54 views

Configure Postfix to route to specific IP based on the recipient MX record

I have Postfix running on a VPS with Ubuntu 12.04, the server has multiple IP addresses. I want to configure Postfix so that it will route mail to send via one of these IP's based on the MX record of ...
2
votes
0answers
20 views

Postfix relaying for multiple domains with Amazon SES

I'm a little confused about relaying with Postfix. I added this line to my /etc/postfix/transport mydomain34.com smtp:email-smtp.us-west-2.amazonaws.com I know this is wrong, but this is what I ...
2
votes
0answers
164 views

Recipient address rejected: User unknown in virtual mailbox table

I have a dedicated linux server running Plesk 12.0.18. On this server, I have running 61 subscriptions, only 1 have this problem. When I want to send an e-mail using roundcube from 1 of my ...
2
votes
0answers
54 views

Dealing with spam flood in Postfix + Amavis

I run a mail server for several thousand users. It uses Postfix + Amavis (with SpamAssassin + Clam). Most of the time it's a pretty happy setup, but from time to time we receive a flood of ...
2
votes
0answers
851 views

When does Postfix not perform lookups in virtual_alias_maps?

I'm having a real pickle of a problem: I have a Postfix 2.6.6 / CentOS 6 server that's set up to forward mail from specific aliases to specific destinations. This is done through a mysql ...
2
votes
0answers
215 views

Postfix mailbox_command + netcat + nodejs

I use Node.js script to process incoming emails and pipe them from Postfix via netcat in mailbox_command (namely: nc 127.0.0.1 3002). Node is listening on port 3002 and calls socket.destroy() once ...
2
votes
0answers
179 views

Mail Service requires reboot every few days

I'm kind of new to postfix so am hoping someone can point me up the obvious here I have a Postfix working as SMTP server and everything is fine for a few days. Then without warning or apparent reason ...
1
vote
0answers
13 views

Troubleshooting: Integration of SSL certificate into Postfix

In order to use TLS on my Postfix server, I have used directly the nginx ssl files from my other server, which also uses the domain that I want to use with postfix. I have integrated the files in the ...
1
vote
0answers
14 views

Debian Postfix distribution list accessible only for few adresses

Actually I'm working with Postfix server and trying to implement distribution list with simple restrictions. My assumptions: I created alias: managers@mydomain.com -> manager1@mydomain.com, ...
1
vote
0answers
23 views

Postfix STARTTSL works in LAN but not from external (centos 7)

if I connect in LAN on port 25 to my mailserver it offers STARTTLS telnet mailserver.com 25 Trying 192.168.0.x... Connected to mailserver.com Escape character is '^]'. 220 mailserver.com ESMTP ...
1
vote
0answers
19 views

Redundant procedure when using Postfix relay

I have a Postfix server with the following main.cf file (I'll show just the relevant info): smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd ...
1
vote
0answers
32 views

Webserver to send emails from Postfix

I have a problem with my web server sending out email from websites through postfix. I have server that is running Ubuntu 12.04.5 and using Apache webserver. I have installed virtualmin on the server ...
1
vote
0answers
15 views

How do I use SRS rewrite the From header on a forwarded email message

I have a serious problem here. I run a labor dispatch website, where users can register their cell phones (I send them an auth code via text, they enter it at the website, it's entirely opt-in). A job ...
1
vote
0answers
13 views

PostFix/Dovecot new installation on Centos6

I have installed Postfix and Dovecot on my server. It seems to be mostly working - I can send mail from my account to a remote account no problem. My problem is receiving it. When I send an email ...
1
vote
0answers
16 views

Alias with all users in mysql table for postfix/dovecot

I have a table with users for my mail server. This table for imap authenfication in dovecot: ...
1
vote
0answers
103 views

Postfix “Connection timed out”

I try to send a few emails, but postfix send only 3 emails every 10-20 min. After that postfix sends 3 emails, I get the error: "Connection timed out". mail.log: Jan 4 12:16:39 mail ...
1
vote
0answers
44 views

How to detect SMTP AUTH attempts in Fail2Ban?

I have a Fail2Ban jail that monitors failed SASL authentications to my Postfix SMTP server. When this occurs, /var/log/mail.log contains these three lines: postfix/smtpd[32591]: connect from ...
1
vote
0answers
12 views

Postfix responds with 450 4.7.1 even though names resolve properly

The following is happening for reasons I do not understand. Excerpt: from mail.log Dec 21 17:03:56 server postfix/smtpd[13014]: NOQUEUE: reject: RCPT from unknown[10.X.X.40]: 450 4.7.1 Client ...
1
vote
0answers
13 views

Limit allowed envelope senders for Postfix's sendmail

I have a Linux server with local accounts (they are used by PHP-FPM processes) that are using Postfix's sendmail binary to send e-mails. All e-mails are sent through local Postfix to a central ...
1
vote
0answers
32 views

Postfix set EHLO name for virtual domains

I need to set EHLO name for my virtual domains. Postfix sending mail with EHLO as JV.localdomain where JV is my hostname my server ip is 62.210.xx.xx I am hosting 2 domains domain1.com and ...
1
vote
0answers
29 views

Postfix sending mails hundreds of times to e-mail address hosted on plus.net

I have a Postfix mail server handling mail relay for web sites. It's working perfectly and delivering hundreds of mails every day without issues. In the past few months, there have been 4 occurances ...
1
vote
0answers
15 views

Authnetication failure with postfix and sasl using sasldb

I'm really not sure what my issue is. I've checked several guides, and I am sure I have set this up correctly, including config fails, restarting the service, permissions etc. OS is Ubuntu Server. ...
1
vote
0answers
42 views

Postfix cannot start but dovecot is ok

My postfix service cannot start. Here is message: Job for postfix.service failed. See 'systemctl status postfix.service' and 'journalctl -xn' for details. And here is service status: ...
1
vote
0answers
679 views

postfix: lost connection after CONNECT/EHLO/unknown from unknown

seeing following error message while trying to send email via postfix on Centos 7 while I can receive and download messages not seeing any errors postfix/smtpd[24532]: connect from ...
1
vote
0answers
30 views

Postfix permit localhost use plain login

I have postfix 2.11 setup on Debian jessie with Dovecot SASL and I require encrypted login mechanism to send mail via smtp. For this purpose in the main.cf I've smtpd_tls_auth_only = yes option set. ...
1
vote
0answers
43 views

Postfix suddenly starts logging “unknown service: smtp/tcp”

Firstly, YES I'm aware of the other post about this, but it didn't help me. A short time ago our sysadmin unexpectedly left the company with no replacement or handover, and now it's on me for the ...
1
vote
0answers
130 views

Postfix fails to verify GMail's DKIM signature

I have my Debian (7.9 "wheezy") E-Mail-server (Postfix 2.9.6-2) setup to sign and verify DKIM signatures in e-mail messages using OpenDKIM (version 2.6.8-4). My server passes the DKIM test at GMail ...
1
vote
0answers
111 views

Postfix Configuration on Ubuntu 15.04 VPS

this is my first time posting here so I apologize if anything (or everything) is out of line. Basically just have a Wordpress site I'm hosting on a VPS running Ubuntu 15.04, MariaDB, nginx. I have ...
1
vote
0answers
42 views

Why does Postfix place mail in a different mail location than I put in main.cf?

I'm trying to figure out why mail is not going to /home/username/Maildir and instead going to /var/spool/mail/ My postfix main.cf has home_mailbox = Maildir/ and dovecot 10-mail.conf has ...
1
vote
0answers
123 views

Quota in Postfix, Dovecot with Maildir Not working

I've some problem with quota with Maildir. If I install a plugin in Thunderbird that shows Quota's it's working and my quota is like 300%. But I can still send and recieve mails. I'm not running any ...
1
vote
0answers
118 views

Dovecot doesn't fetch mail from Postfix

I have installed Postfix on remote machine that successfully sends emails as well as receives. In order to connect to that remote server through email client (Thunderbird) I have installed Dovecot. ...
1
vote
0answers
42 views

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: ...
1
vote
0answers
450 views

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 ...
1
vote
0answers
269 views

Unable to send email via Postfix SMTP via Mac Mail App

I installed a SMTP server with Postfix as mail agent (on Ubuntu 12.04). Config is as follow: $ postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no ...
1
vote
0answers
196 views

Password mismatch in dovecot with postafixadmin

After many hours trying to set up a new mail server, I just can't figure out why the passwords which postfixadmin store are a mismatch with what dovecot passes for authentication. In postfixadmin, ...
1
vote
0answers
108 views

Postfix/Dovecot multiple authentication backends

I trying to configure multiple sources on a postfix/dove server of all these: virtual_alias_maps = ldap:/etc/postfix/valiases.cf,ldap:/etc/postfix/useraliases.cf,ldap:/etc/postfix/groupaliases.cf ...
1
vote
0answers
332 views

Postfix on server with multiple IP addresses sends mails with wrong HELO in header

I have a VPS with multiple IP addresses: venet0:0 x.x.x.2 venet0:1 x.x.x.3 venet0:2 x.x.x.4 venet0:3 x.x.x.5 All IPs have A records m2.domain.com -> x.x.x.2 m3.domain.com -> x.x.x.3 ...
1
vote
0answers
582 views

Postfix + Saslauthd + Kerberos 5 + CentOS 7 not working

I've almost got saslauthd checking against Kerberos but seeing some last issues on CentOS 7. When postfix talks to saslauthd, it sends a lowercased domain and it's not corrected. I tried to fix things ...
1
vote
0answers
71 views

Spamassassin not respecting my blacklist

I've tried putting my blacklist_from and whitelist_from lines in ~/.spamassassin/user_prefs and in /etc/spamassassin/local.cf, but they appear to be ignored. This is from postfix's master.cf: smtp ...
1
vote
0answers
112 views

Postfix on Linux: easy way of masquerade_exceptions=<all system users>?

... well, the subject says it: in a NULLCLIENT configuration, we want to have all normal users to be masqueraded, but all system users should be exposed. The sysadmins get system user's mails from a ...
1
vote
0answers
2k views

Diagnose SASL LOGIN authentication failure with postfix and sasldb

I am trying to configure a Postfix SMTP server on my personal machine (ubuntu server) using sasldb2. So far what I have set up works well with the test command: testsaslauthd (however it may be ...
1
vote
0answers
222 views

POSTFIX: how to determine how many connections are currently active

I'm running postfix on a mail server which is used by a couple hundered users. One user is getting "Connection Interrupted" errors in Outlook when attempting to send. I have not had reports of this ...
1
vote
0answers
339 views

Postfix performance and how to increase my throughput?

What I've read so far: Postfix Tunning Postfix Bottle Neck Analisys The Book of Postfix (chapter 22) I have similar specs to this guy but I'm only able to send about ~1300 emails/hour What I've ...
1
vote
0answers
319 views

Missing Client IP in postfix Received header

I just noticed my postfix setup has been having a problem for some time now. When receiving (some) mail from German freemail provider web.de, the following headers are found inside the mail postfix ...