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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3
votes
1answer
66 views

Postfix/Dovecot - Multiple Domains and Multiple Linux Accounts

I have been trying to setup a new mail server to migrate from my VPS, as my host has decided to close its doors. The old server was running Exim/Courier (nearly a decade old at this point,) and I'm ...
-1
votes
1answer
31 views

Postfix Send many messages in one connection

i have a question about postfix. We cand send to our providers smarthost 4000 Mails per Hour. When we send this messages, we got the failure too many connections back. Now i want to send all theese ...
0
votes
1answer
23 views

Postfix ignoring relay_recipient_maps?

I am trying to setup a mail relay running Postfix in the DMZ to forward all incoming mail to the internal LAN connected mail server. I would like to be able to refuse incoming mail for non-existent ...
-1
votes
1answer
55 views

setup postfix SMTP on amazon ec2 [on hold]

Im trying to setup a postfix SMTP mail server on my amazon ec2 instance. I followed this guide http://cybart.com/how-to-install-and-configure-postfix-on-amazon-ec2/ and many others I found which ...
0
votes
2answers
21 views

Postfix multiple IPs: which to use for SMTP AUTH?

I am setting up a mail server which has separate IP addresses for sending and receiving mail. My config looks like this: # The addresses we send out on: smtp_bind_address = 185.xx.xx.101 ...
3
votes
1answer
96 views

postfix loopback email and exchange issues

I have plesk setup on a server with multiple domains already living and breathing, including email which all works fine. My issue comes in with a new domain I added that is using exchange for the ...
-2
votes
0answers
22 views

Alter all outgoing email to add return-path to it (Qmail or Postfix) [duplicate]

Is there a way (config option or program, script, etc) that can filter all outgoing email in order to add a return-path to each message sent from that server ? I would need it for eider Qmail or ...
1
vote
1answer
39 views

Dovecot - Fatal: execv(/usr/lib/dovecot/imap-login) failed: Permission denied

I'm in the process of trying to set my own mail server reasonably closely following this guide: http://sealedabstract.com/code/nsa-proof-your-e-mail-in-2-hours/ I've just started to test the ...
0
votes
0answers
26 views

Sendmail and Postfix: Email Masquerading Issues

I'm trying to do email masquerading but it isn't working. Would having these entry prevent the email server from masquerading emails? # On our Sendmail server define(`SMART_HOST', ...
2
votes
1answer
83 views

Postfix hard bounced emails are not rejected

UPDATE: This problem can be reproduced by installing Postfix within docker container. I tried to recompile from source 2.x and 3.x latest postfix versions, but it didn't solve the problem. I have ...
-2
votes
0answers
15 views

umask 002 opendkim illegal value

When I try to start opendkim I receive the following error: Starting OpenDKIM: opendkim: /etc/opendkim.conf: configuration error at line 3: illegal value opendkim. In line 3 I have the umask ...
1
vote
3answers
55 views

Migrate VPS to Same Machine Without Losing Emails

I have a centos 6 VPS running ispconfig that isn't in good shape at the moment. Yum is broken beyond repair and it looks like my best option for fixing is a reinstall. I'm planning to backup, install ...
-1
votes
1answer
27 views

Postfix to Dovecot connection was interupted, where did Postfix store my email?

I upgraded my postfix and dovecot mail server, turns out I forgot to configure delivery from postfix to dovecot. Postfix instead delivered the email itself(according to the logs as it's says ...
3
votes
2answers
65 views

Postfix virtual domain mapping for a Linux username containing @

I could not make Postfix work with Linux usernames containing @ Postfix has virtual domain map, in /etc/postfix/virtual It looks something like this: domain.ru domain.ru ...
1
vote
2answers
39 views

Postfix sender acces restriction - Security breach?

We encounter security problems with our mail server and would like some advice. The story behind it On our mail server (Postfix 2.9.6 + Dovecot 2.1.7) we would like to be able to create restricted ...
2
votes
2answers
65 views

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 ...
1
vote
2answers
23 views

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 ...
-1
votes
1answer
36 views

Spam sent from my domain after a Wordpress exploit [duplicate]

I have 2 domains on my dedicated server running debian. One of them is linked to a wordpress site, mydomain.com. I've noticed that on both my sites, lately, the performances were horrible so I ...
0
votes
1answer
52 views

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 ...
0
votes
0answers
48 views

Postfix Clogging Up

I have an OS X mail server running using server.app. In the background, it runs Postfix. Recently, my mail queue has been clogging up and I'm not quite sure why. I'll try to force the queue with sudo ...
-3
votes
1answer
52 views

Multiple email domains on the same server [closed]

I use Postfix/Dovecot for my emails. They work together well. Now I have a server with multiple IP addresses, and I want to host each IP address with a domain for mails. But it seems Postfix and ...
0
votes
0answers
33 views

mailjet with brimir (open source Ruby project) on debian doesn't send mail

I tired of searching a tip to be able to send mails with mailjet on my debian. I configured a dashboard for tickets (Brimir, Ruby open source plateform) Here is the link : ...
1
vote
1answer
25 views

postfix multiple alias with response (from alias mail)

I have a postfix - dovecot mail server installed over a Ubuntu 14.04 VPS. Is the following situation possible? I have tried using alias, but when i try to reply the mail, this one is delivered from ...
0
votes
2answers
49 views

google compute enging postfix relay through gmail

I would like to send directly through gmail, since we have google apps and use gmail as our domain email. I would like to get rid of sendgrid so I can possibly not be marked as spam. I found this ...
0
votes
2answers
54 views

smtp blues - external emails works, internal does not

I have 3 domains hosted on a remote server, but I am using other postfix server for SMTP only. So, I have two servers: mail.domain1.com - remote mail server, storing mailboxes and used for IMAP ...
0
votes
2answers
35 views

Mail Server for a subdomain on a different Server?

I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on ...
0
votes
1answer
91 views

Postfix + Dovecot fatal: no SASL authentication mechanisms

When I try to login via telnet I am getting kicked out immediately: telnet localhost 25 Trying ::1... Connected to localhost.localdomain. Escape character is '^]'. Connection closed by foreign host. ...
1
vote
2answers
63 views

postfix authenticate disable smtp port 25, but 587

I am trying to make postfix not to auth users on port 25 but only on 587 and using STARTTLS. I have tried may different confs, but no success so far. main.cf: ... smtpd_sasl_auth_enable ...
2
votes
1answer
70 views

Only enable SRS when forwarding to enable DMARC

I am setting up a mail server on my VPS and in order to prevent spam and being marked as spam I have enabled SPF, DKIM and DMARC. However, I do not want to host my own mailbox, so I forward the ...
-1
votes
1answer
152 views

Dovecot-core fails to start

I am attempting to follow this tutorial: https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassassin I believe someone before me ...
0
votes
3answers
48 views

postfix or sendmail monitoring [closed]

I’m interested in alerting a support team in email when mail is backing up and not being relayed as expected, ie sending is delayed. I tried in nagios, there isn't any solution. I tried with logwatch, ...
2
votes
1answer
63 views

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 ...
1
vote
1answer
36 views

postfix SMTP outgoing gateway server, Software RAID1 vs RAID1 + RAID 0 on 2 disks

I have this old smtp server that is currently running Windows 2003 and with EOL I want to move it to something that will continue to get security upgrades but at same time I want to improve ...
0
votes
1answer
62 views

Use LDAP and Local auth as a backup on mail server

We are currently researching the best way to go about switching our mail server (dovecot/postfix/debian 7) from local authentication to ldap (AD) authentication. We would like to have local auth as ...
0
votes
1answer
212 views

Debian 8 Jessie - Postfix + Dovecot, send but not receive mails

I'm setting up a mail server (with Postfix, Dovecot and Postfixadmin) for a non-profit organization that I'm currently building. I'm able to send but not receive mails over TLS. When sending an email ...
-1
votes
1answer
37 views

Transfer existing email to new postfix/dovecot server via POP3

I have to build a new email server with dovecot/postfix on CentOS because an existing supplier is becoming too erratic with their billing. I can do that but I am worried for a small problem. If I ...
-1
votes
1answer
56 views

Multi-IP address machine make postfix HELO name match the reverse DNS of the source IP that is bound to

On a Centos 6.6 server we have typically 3-4 Failover IP's that we distribute among our domains. In this way postfix, when sending outgoing email, binds to the IP linked for the domain separtating ...
4
votes
1answer
121 views

DKIM not signing with alias addresses - not internal, not authenticated

I have postfix, dovecot, opendkim and postsrsd installed. I am trying to forward mail from alias@example.com to myemail@gmail.com, and have them signed with DKIM. I use postsrsd in order for the SPF ...
1
vote
0answers
22 views

Postfix SMTP authentication FROM [duplicate]

I have a Postfix server with authentication running. However I recently found out, that anyone authenticated may send mail from any account. Meaning user1 is logging in and may send the e-mail from ...
-1
votes
1answer
39 views

Email Going Missing

I've setup Postfix for email delivery on a client's server and made sure that our PTR records, SPF, and reverse DNS is all configured correctly. As far as I can tell, we're doing everything correctly ...
0
votes
0answers
37 views

Postfix/Devcot Relay accedd denied and no SASL mechanisms

I am trying to configure Postfix and Devcot on my VPS and use it with Roundcube webmail and other Mail clients ( Outlook, Thunderbird... ). The problem that I am facing right now is that maillog ...
1
vote
1answer
27 views

Configuring dovecot and postfix ssl setting by jks file

I have CA JKS (Java Keystore) file which the CA bundle was added to it completely and we don't have any problem with java stuffs. Now how may I export/manipulate, keys and required stuffs for setting ...
1
vote
3answers
82 views

How much overhead does having infinite email aliases cause on the email server?

I was wondering if allowing users to have infinite number of email aliases have much overhead on the email server. For example, my mail email address could be vlad@vladmail.com but I could also use ...
1
vote
0answers
38 views

Postfix no outer mails recived because of “unknown user 550” (sending & local reciving possible) [closed]

I have the following problem: I can't recive emails on my email account on my server. Postfix sends back: error: unknown user (550) - mymail@domain.tld But it is possible to send mail with other ...
0
votes
1answer
60 views

Why don't I receive the emails forwarded by Postfix?

My desired Postfix configuration is to forward all incoming mails according to virtual aliases and be able to send outgoing mails via SMTP and TLS. Sending already works, but the forwarding does not. ...
-1
votes
1answer
111 views

postfix/smtpd lost connection after AUTH from <server>[ip]

I try to send mail from a private LAN server to my private postfix server and I get this error, but I can't find its meanning: # /var/log/mail.log Jul 8 15:02:50 mail-srv postfix/smtpd[18222]: ...
0
votes
1answer
10k views

after install ssl certificate fatal bind xxx.xxx.xxx.xx port 587 already in use

I have an Ubuntu 12.04 server setup with Virtualmin/Webmin latest version using a self-signed certificate generated during installation working fine for more than a year without any problem. This week ...
2
votes
1answer
48 views

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 ...
0
votes
1answer
95 views

Postfix on CentOS 6.6 is overwriting my return-path header?

I'm dealing with this problem on my CentOS 6.6 server: when I send a mail with PHP/phpBB (mail() function), Postfix overwrites the return path with apache@servername. The issue is also expained in ...
1
vote
0answers
21 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: ...