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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0
votes
1answer
55 views

Postfix Send only Without a FQDN

I'm using OSSEC and Nagios to build a sort of HID system on our network. Everything is going smoothly so far; however I cannot get OSSEC to send email alerts. What I'm trying to do right now is get ...
0
votes
2answers
43 views

Configure mail for multiple domains VPS

I have a VPS with a few domains: domain1.com, domain2.com FQDN = domain1.com A self signed certificate for FQDN is configured automatically. iRedMail (postfix + dovecot) is configured on this VPS. ...
-3
votes
1answer
61 views

SMTP (postfix) and iPhone - can't send emails - reject: RCPT

I try to setup email server already 2 days, everything work flawless when i use roundcube on PC, I can send and receive emails, but problems start when I want to setup my email on iPhone. I can ...
1
vote
2answers
27 views

postfix virtual_mailbox_maps causes Relay Access Denied

I have postfix 3.0.3 running with PostgreSQL 9.4. My main.cf is here: broken_sasl_auth_clients = yes inet_protocols = ipv4 local_recipient_maps = $virtual_mailbox_maps mail_owner = postfix ...
0
votes
1answer
29 views

Change Return-Path address with postfix/opendkim

I've just set up opendkim on my server. Prior to this I had postfix set up to have the return path headers set to info@domain.com now after installing opendkim that's now changed back to what it was ...
-1
votes
1answer
30 views

Postfix - Host or domain not found

I installed postfix on my centos. this is postconf -n output: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix ...
0
votes
0answers
43 views

postfix Delivery expired (message too old) '[Errno 61] Connection refused' (delivery attempts: 0)

My postfix mail users have the following error being thrown at them when they send a mail. Action: failed Status: 5.0.0 X-Supplementary-Info: < #5.0.0 smtp; 5.4.7 - Delivery expired (message too ...
1
vote
1answer
20 views

postfix: aliases will be ignored

I have a server which is configured as a postfix MTA and on which runs also a munin node. In /etc/aliases I have add: root: hostmaster@my.domain in the main.cf of postfix is configured: ...
3
votes
1answer
175 views

Should local network host names and IPs be stripped from mail headers?

I'm completely confused about question of necessity/benefit of stripping local network host names and IPs from from mail headers. Two years ago I've found an article which states that modern ESPs ...
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
1answer
46 views

ClamAV Milter service will not start after updating clamav-milter

I recently updated ClamAV. Here are the packages that were updated: clamav-db-0.99-3.el6.x86_64 clamav-0.99-3.el6.x86_64 clamd-0.99-3.el6.x86_64 clamav-milter-0.99-3.el6.x86_64 ...
0
votes
0answers
8 views

virtual_create_maildirsize in new postfix (2.9.1) Debian

I have created a script to show free space on mailbox using file maildirsize (in /home/vmail/mydomain/mymail/) This file was autogenerated in my old postfix Version (2.7.1) but not now, is any way to ...
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 ...
4
votes
1answer
70 views

How to disable RC4 on postfix?

I have make a security check of our postfix server on https://de.ssl-tools.net/mailservers and get a warning that "ECDHE_RSA_WITH_RC4_128_SHA" is still supported. But don't know how to disable that ...
3
votes
1answer
50 views

Having troubles receiving emails from Gmail

I'm having problem with receiving emails from Gmail. The problem is gmail only. I can send mails to gmail and receive it perfectly in gmail. I also being able to receive mails from yahoo and other ...
0
votes
2answers
66 views

Emails going to spam - Gmail / Hotmail / Outlook? [duplicate]

Right, sorry if I come across a frustrated but I'm actually raged that I haven't got this sorted yet. We moved to a dedicated server 2 months ago, from a shared server (which had no issues with ...
1
vote
1answer
44 views

Amavis not found by Postfix

I'm having this super annoying Postfix problem. I did a clean install of my web/mail/everything server and configured ISPConfig 3. Everything right now is working, except for Postfix. I can't send or ...
0
votes
0answers
25 views

How do I block ALL outgoing mails (errors connecting to sender, bounce, timeout/error/warning etc.) from my postfix mail server? [duplicate]

I currently have default settings in my postfix server, running ubuntu. Basically, I the server has to be a blackhole for mails. Some solutions I thought might work: Redirect all outgoing mails to a ...
0
votes
1answer
22 views

Remote Postfix server for email relaying multiple domains

I have a local server at home that needs to send and receive email but my ISP blocks port 25 in and out. The local server is running Debian 8, has Virtualmin installed on top of it with postfix and it ...
0
votes
1answer
40 views

Don't receive emails after restoring mails on postfix (ubuntu-server)

I recently swichted my virtual server and for that reason I had to move the whole postfix from the old to the new server. I created an archive (.tar.gz) for each domain in /var/qmail/mailnames/ For ...
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
1answer
73 views

Postfix: Set custom SMTP Banner based on domain (same ip) used to access server

I have multiple domains on my server pointing to the same ip address. How can I setup postfix to greet with each individual smtp banner based on the domain name? I've searched everywhere but didn't ...
0
votes
0answers
24 views

postfix filter “Do you want to have more lovers?” [duplicate]

My postfix is currently set up to check email content and reject by keywords. However, I can't think of a good way to block this kind of emails: Return-Path: <gievcyopa@beamtele.com> ...
3
votes
0answers
65 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 ...
0
votes
0answers
19 views

Postfix sending limitation

I am a complete newbie in server-administration, but with this new work I am actually the system admin. So, first of all, I am kinda sorry for my poor property of language - but I am actually a web ...
0
votes
0answers
24 views

postfix rejects all EMails Recipient address rejected: User unknown inlocal recipient table

Hi Together I've got a problem with my postfix server and i can't solve it. I set up a local mailserver with dovecot and postfix to receive e-mail over my own domain. It worked fine till i tried to ...
-3
votes
1answer
43 views

Postfix & Fail2Ban Services

Why fail to ban catches [1217982] MONTH Day Hour:Minute:Second result from the /etc/fail2ban/filter.d/postfix.conf ? These messages: 2015-12-13 23:50:29,076 fail2ban.filter.datedetector[22333]: ...
0
votes
0answers
30 views

DKIM fail signature doesnt verify

I had setup postfix and dkim and keep on getting dkim=fail on port25 and gmail checks. DKIM check details: Result: fail (signature doesn't verify) ID(s) verified: Canonicalized Headers: ...
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 ...
2
votes
1answer
75 views

Can't send email to myself via gmail and postfix forwarding

I set up postfix to forward email to my gmail account. I can send email from this server to my gmail, I can receive outside email and it's forwarded correctly (even from other gmail accounts). ...
0
votes
1answer
21 views

“lost connection after UNKNOWN” (OpenDKIM + postfix receiving emails)

I had a fully working mail server before installingopendkim with TLS with a free StartSSL certificate, that Thunderbird could interface with properly to send/receive email. My distro is Debian 8. ...
0
votes
0answers
17 views

SMTP server for Python parser

I'm trying to get emails into a Python application. There is an exchange server that marks some emails with a BCC address for archive@somedomain.com. I do not control the Exchange server. The email ...
0
votes
1answer
7 views

Postfix CatchAll Except local domains

I'd like to expand on my existing catch-all (from answer) Email catch all (domain and subdomains) Postfix So emails to *@example.com are delivered to *@example.com but emails to *@gmail.com are ...
0
votes
0answers
7 views

Access denied error connecting to SQL DB with Postfix

I have no idea how to go about debugging this. I have created an SQL user called postfix and i have verified that i can log into the DB with this user and edit tables. I have configured postfix to use ...
0
votes
0answers
53 views

Postfix “ Sender address rejected: not owned by user”

I've setup a Postfix/Dovecot mail server on AWS. I've implemented self-signed TLS authorization, connected to it from and external TBird client and tried to send/receive email. TBird is able to ...
0
votes
0answers
15 views

Relay email from a specific user through SMTP in Postfix

This is a very simple question and sorry if it is obvious/already answered. I have a mail server that I use to send mail from my primary domain. I have it set up just how I want it with TLS only, ...
0
votes
0answers
43 views

DKIM, SPF, DMARC, SPF OK mails are flagged as SPAM

I have a dedicated server running CentOS7 with Postfix, the problem is that all the sent mails are flagged as SPAM by hotmail and gmail despite DKIM, SPF, DomainKeys, DMARC records and keys wich are ...
0
votes
1answer
12 views

Postfix rejecting inbound mail to virtual mailboxes

I followed this tutorial to setup an email server that uses virtual users. https://www.rosehosting.com/blog/mailserver-with-virtual-users-and-domains-using-postfix-and-dovecot-on-a-centos-6-vps/ I am ...
0
votes
0answers
19 views

postfix whitelist all incoming mail with a specific domain destination

Would it be possible to whitelist all incoming mails with a specific recipient domain. I have multiple domains running on my mailserver. I want to simply push thru all the incoming mails with a ...
0
votes
0answers
114 views

Debian : Postfix unknown mail transport error

I try to send mail from my Gmail from a VPS on Debian 8. I followed the tutorials : https://easyengine.io/tutorials/linux/ubuntu-postfix-gmail-smtp/ And ...
-3
votes
1answer
30 views

Postfix: How to secure port 25? [duplicate]

How can I secure port 25 in postfix/dovecot? Right now, I can send internal email through telnet without login. For example: telnet mydomain.com 25 MAIL FROM:<me@mydomain.com> 250 2.1.0 Ok RCPT ...
1
vote
1answer
42 views

Postfix SSL-Intermediate-CA

I got a thawte Wildcard SSL-Cert for for *.my.example.com. Now I would like to use it for my mailserver (hostname: test.my.example.com). I edited the /etc/postfix/postfix_default.pem and included ...
2
votes
1answer
64 views

Validate email address at my own domain with gmail

I need to have the ability to send email using gmail's web interface, but have them appear to originate from my own domain instead of originating at a gmail address. In order to do this, gmail asks ...
0
votes
0answers
21 views

Postfix + Dovecot - Internal Relay

I have a postfix/dovecot mail server setup. Mail is working perfectly. External relays are disabled. The issue is external servers can telnet to smtp 25 and spoof email from any valid domains hosted ...
0
votes
3answers
53 views

Postfix not working with user@example.com type user

I have some virtualhost set up on Centos 7.1, I want to have user like user@example.com so that I can reply via user@example.com and not like user@localhost.localdomain Postfix is working with user ...
1
vote
2answers
81 views

Firewall rule to only allow Postfix to send email through SMTP on port 25

As suggested in How do you detect a spambot on your network? how can I setup firewall rule to allow only Postifx to send emails using SMTP on port 25 and disallow all other applications to send on ...
1
vote
2answers
43 views

Postfix config for virtual aliases and sasldb

I'm trying to set-up postfix to handle several domains as aliases, with an SMTP server accepting incoming mails from these domains with sasldb authentication. The documentation looks quite old, and ...
0
votes
1answer
37 views

SMTP not reachable

for some time now I am not able to reach SMTP on port 25 or 587 on a server of mine from the outside though both ports are open and postfix is listening on them: $ telnet domain.tld 25 Telnet escape ...
3
votes
1answer
40 views

Are rejection messages stored anywhere on a postfix server?

I am working, with very limited experience, to recover messages that were sent to an address on a postfix email server that had been forwarded to a bad address. So the messages were rejected, but were ...
2
votes
4answers
248 views

False IP blacklisting on CBL and Spamhaus ZEN

I've gone thru this: Spamhaus XBL keeps adding my IP I'm managing the server 23.239.30.81 on Ubuntu using Postfix. Since last 6 months or so I started forwarding all my: Cron Daemon logs ...