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
18 views

Postfix behind a firewall

I have two servers : the first one, a frontend / firewall (using iptables) the second one, containing Postfix I want to use the IP address of the firewall server to send emails. If I send an email ...
-1
votes
0answers
23 views

How to reject sender if adress is local alias

is there a possibilty to reject emails if the sender address is a local (virtual) alias. I have an address me@example.com redirecting to me@otherexample.com As me@example.com is only an alias, it ...
0
votes
0answers
8 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
votes
1answer
16 views

Postfix - ability to send mail from alias address?

I have a mail server with Postifx (and dovecot) setup, on which there is an alias address (say alias@example.com) which forwards mail to my main email (myname@gmail.com). This works fine, and all mail ...
1
vote
0answers
11 views

Postfix SMTP server: errors from

I'm running the Postfix mail server ru000397.widhost.net. I'm getting some of these messages in postmaster@ru000397.widhost.net. The mail service is working and, obviously, there is much free space ...
-2
votes
1answer
17 views

Postfix rewrite sender only in emails to distribute list

I need to configure distribute mail list with postfix only, not using mailman or other mail lists software. The address of mail list list@example.com is an alias, with forwarding to many email ...
0
votes
1answer
45 views

SMTP: Setup TWO servers to receive / store emails the same at the same time

My question aims to clarify whether I can get a setup running, where Server A on 1 site receives email as is received at the same time by Server B on site two. The requirement is to have Server B be ...
-2
votes
0answers
14 views

mail log error (dovecot - postfix -amavis) and spam folder config [on hold]

Im having some trouble to filter mail error logs (Mail Server - Postfix - Dovecot - Amavis -ClamAV - SpamAssasin). Right now i can see my logs in the "/var/log/mail.log" file. Is there anyway to get ...
-3
votes
0answers
14 views

Postfix and dovecot configure sending OK receiving KO

i was follow this tutorial: http://www.server-world.info/en/note?os=CentOS_7&p=mail&f=1 http://www.server-world.info/en/note?os=CentOS_7&p=mail&f=2 the problem is i can send mail but ...
0
votes
1answer
25 views

Postfix Login failed, please check the username and password

So I have followed this guide to set up Postfix with multiple domains/IPs http://unix.stackexchange.com/a/179175/102085 However now I am trying to send emails I get the following error Login failed, ...
1
vote
0answers
13 views

Spamassassin rule to compare return-path and from fields

Recently I noticed a recurring pattern in some of the spams I get. The return-path and from headers always have the same structure. Let me explain with an example: Return-path: ...
0
votes
1answer
25 views

Postfix dynamically set Relay Host [duplicate]

Does anyone know of a way to dynamically set the relay host when sending mail through Postfix? At what point does Postfix set the relay host? Is there some way that I can tell Postfix to use a relay ...
-2
votes
0answers
8 views

How can I block outgoing email with multiple recipients with non matching domains?

We have Exchange 2007 and I've been trying to work out how to block outgoing emails from certain internal users/ groups where the recipients are in different domains so that any single outgoing email ...
0
votes
0answers
19 views

Covert Old Dovecot Configuration to New Format

I am trying to setup a very simple mail server with virtual domains with Postfix and Dovecot. I was following this steps to setup the postfix and first part it worked fine. ...
-2
votes
2answers
44 views

Just-installed Postfix + Dovecot on Debian 7 Sends but not Receives

After changing the Postfix default port from 25 to 26 (MySQL uses port 25), I can now send out mail from my box. But I can't get mail in. My mail.log shows the sent mail making it out just fine, but ...
1
vote
1answer
39 views

Outbound port 25 connections timing out all of a sudden: Centos 6.6 & postfix; hacked?

I have been running a Centos email/web server for years, with a Linode Xen server the last 4 years with almost no trouble. Since sometime yesterday I have not been able to connect to outbound email ...
0
votes
1answer
15 views

CentOS6.6 + Postfixadmin 2.3rc5 + PHP5.3, upgrade to PHP5.4

We're running PHP5.3.8 on a CentOS6.6 mailserver with Postfixadmin 2.3rc5. The client only wanted a mailserver at first, but then wanted to move some other sites to this server. Some of the sites need ...
-2
votes
1answer
19 views

postfix what is this, check_policy_service inet:127.0.0.1

When I got a 451 4.3.5 Server configuration problem, I was informed to delete these settings from postfix configuration: check_policy_service inet:127.0.0.1:7777, check_policy_service ...
-2
votes
0answers
22 views

Blocking banned mail attachments in zip

I have a Zimbra server setup and am having trouble with emails that contains .exe files within .zip attachments. All .exe attachments are blocked but they are getting through when they are zipped. Is ...
2
votes
1answer
24 views

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) ...
-3
votes
1answer
36 views

Rename “MAILER-DAEMON@” from postfix/dovecot [closed]

Have some method of change MAILER-DAEMON@example.com to postmaster@example.com or at least mailer-daemon@example.com in Postfix/Dovecot? I sought some forms in the Postfix configuration, including ...
1
vote
0answers
18 views

What is the best way to harden a postfix null client on an exploited php webserver?

We use postfix as a null client to send out mail from a php webserver via sendmail. We host our incoming mail servers elsewhere and use a SPF record to authorise the server to send emails from our ...
0
votes
1answer
14 views

What is a saslpasswd2 domain?

What does saslpasswd2 do, in particular, what is the domain option for: -u domain use domain for user domain (realm). UPDATE: Suppose, I: smtp login to smtp.mydomain.com, as ...
0
votes
1answer
18 views

What FQDN should I use for Postfix setup in Satellite Mode on Ubuntu VM on VirtualBox?

I am getting lost with trying to configure Postfix on a Ubuntu 14.04 VM running on VirtualBox. The VirtualBox has 2 NICs: 1)NAT and is Internet access through my computer running the VM and ...
2
votes
1answer
27 views

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 ...
0
votes
1answer
31 views

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 ...
0
votes
1answer
29 views

Postfix virtual domains: how to send emails to local or not destination with the corresponding virtual domain of every virtual recipient?

I need help to configure a postfix in a server as recipient and sender for many virtual domains and sub-domains. I want every email sent from any local recipient of this server reaches its destination ...
-1
votes
0answers
28 views

HTTP Error: Connection to server lost

We had a server that was running Postfix / Dovecot and Zarafa just fine, and the database (MySQL) crashed. So we after some thoughts we just decided that we drop that database and lose emails. Thus ...
1
vote
1answer
15 views

match local recipients in virtual_alias_maps

I want to redirect all local mail by specifying an address in virtual_alias_maps file. It is possible to match recipients with regexp, but it's too complex. They can be: no domain (root etc.) ...
-3
votes
2answers
21 views

postfix not respecting aliases [closed]

I have a small server that is suposed configured to use my gmail account to send emails about the readings the borad takes I can send emails all right but I have noticed something strange - I ...
1
vote
1answer
28 views

postfix logs show dodgy connections

I have regular connections from an IP that appears in OpenBL list and I would like to understand what it does. If it failed at authentication phase, I would get auth errors (and he would be banned by ...
1
vote
1answer
28 views

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 ...
2
votes
1answer
16 views

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/: # ...
0
votes
0answers
16 views

gpg-mailgate removes content of e-mails

I have installed gpg-mailgate from this repository on my server as stated in the INSTALL file. It does seem to work, partially. As it would be expected, when sending an e-mail to an account on my ...
-2
votes
1answer
22 views

Another private/auth not found thread in postfix-dovecot combo

If I try to send mails through my relay I get: warning: SASL: Connect to private/auth_dovecot failed: No such file or directory fatal: no SASL authentication mechanisms The auth part in main.cf: ...
0
votes
1answer
16 views

Postfix virtual_mailbox_maps mysql lookup on 2 different DBs

I'm trying to configure a postfix server to receive email for 2 different domains (no problem so far). But the users/mailboxes for both domains need to be looked up in 2 different tables on 2 ...
3
votes
1answer
28 views

Acces Denied when implementing policies in (postfix + policyd2)

I'm trying to use postfix + policyd2 to limit amount of outgoing emails. But when implementing policyd2 policies i get Access denied - no mater what i do i get denied. Postfix version 2.11.4 ...
1
vote
0answers
37 views

Postfix: 'Relay access denied' - all incoming mail is rejected

I am testing my PostFix setup by sending email from my gmail account to an account on a virtual domain. Postfix's response is invariably: NOQUEUE: reject: RCPT from ...
-1
votes
4answers
98 views

Why are many mail servers using subdomains like mail.example.com?

I'm just setting up dovecat and postfix for the first time and wondering why so many companies are using subdomains for IMAP and SMTP like smtp.mail.example.com and imap.mail.example.com? What are ...
0
votes
0answers
19 views

Updated hostname of server but old hostname still appearing appearing in Postfix logs?

Been having some trouble with emails bouncing when being sent to certain addresses from our CentOS 6.4 Media Temple DV server. I am no expert but after checking the mail logs it appeared that they ...
-2
votes
1answer
13 views

TLS for outgoing mail (following ISPmail) not working

I built my mailserver on a vserver after the ISPmail tutorial (https://workaround.org/ispmail/wheezy) (which is awesome). The only remaining problem is that it does not seem to use TLS with outgoing ...
0
votes
1answer
18 views

Postfix not receiving mail for virtual domain from outside (only locally)

I have postfix mail server running at mail.123.com (ip eg 1.1.1.1), then I have site books.com (ip eg 2.2.2.2) and it's DNS records like this: MX record as mail.123.com A record mail.books.com same ...
0
votes
2answers
23 views

Postfix forwarding all email regardless of restrictions

I'm trying to set up Postfix to relay mail only if it's coming from localhost, AND only if it's going to a certain domain. However, as soon as I've specified a relay server, everything (except local ...
1
vote
2answers
33 views

How to verify if my postfix uses really TLS to send outgoing mails?

I successfully installed Postfix on my VPS. I would like to send encrypted email. I installed all certificates and private keys and set my conf file: smtpd_tls_key_file = <path to my private ...
1
vote
1answer
37 views

Postfix behind a relay to handle incoming and outgoing mail with /etc/aliases

I'm trying to setup postfix on a Linux machine (Debian 8 with Postfix 2.11). But I have some troubles getting /etc/aliases to work correctly. The setup is as follows: A MS Exchange server is the ...
-1
votes
0answers
30 views

Postfix+Dovecot: Fatal: No SASL authentication mechanisms [duplicate]

I didn't find any suitable answer anywhere on this web-site. I found ony answers for Cyrus or unsuitable answers. I'm configuring test mailserver, based on Postfix, Dovecot v.2.1.7, SASL and MySQL. ...
-2
votes
1answer
48 views

Postfix setup for LAN only [closed]

I have Ubuntu on which I installed Postfix. Postfix packet is up and running. I'm trying to make a simple e-mail system to work between a few LAN computers. Basically, I need to have some outlook ...
1
vote
0answers
59 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
1answer
33 views

Mails not being received. status=deferred (lost connection with 127.0.0.1

I have a MiaB box with about 30 email boxes. This errror pops up in /var/log/mail.err but with no other information. WARNING! Error in process_request eval block: /usr/sbin/spampd: write error ...
0
votes
1answer
13 views

Postfix - Allow authenticated connections on encrypted connection only

I currently have Postfix setup to deliver mail to local users without authenticating (to receive incoming email from other SMTP servers for my local users), and with SASL so my users can authenticate ...