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
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3answers
1k views

Postfix - Opendkim - Unable to connect to local socket

I am getting denied errors when postfix tries to connect to the unix socket for opendkim, actual error: Sep 24 15:41:43 service-a-4 postfix/cleanup[17414]: warning: connect to Milter service unix:var/...
-3
votes
1answer
21 views

SMTP port listening but unable to connect

I used this tutorial to setup a server on Ubuntu using Postfix and Dovecot. Everythings looks like it should be working tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN ...
-1
votes
0answers
16 views

Linux Server Sending Spam, Linux Malware Detect / ClamAV can't find the malware [duplicate]

I am using Linux Malware Detect and ClamAV in order to find spam malware on my linux server (Debian Squeeze). It doesn't seem to find what is sending it, as me and other users keep received rebound E-...
-1
votes
1answer
17 views

Does using an smtp relay help preventing your email going into spam? [duplicate]

Does using an smtp relay such as google's smtp-relay.gmail.com prevent (or at least help) your emails not going into the spam folder on the recipient?
0
votes
0answers
10 views

How to make Postfix null client save a copy of sent email to Office 365 sent items folder

We've got bit of software that is sending email by smtp which unfortunately isn't configured to save a copy of the sent mail to any folder. The client is on Office 365 and there's no way at present ...
1
vote
4answers
2k views

Extract sender activity from postfix logs for auditing user

We have a mail user on our postfix server that was using the company mail to send compromising information to our competitors. I've been asked to make a report of the actions for that user in the ...
0
votes
0answers
15 views

How to make Postfix Receive Email for 2 IPs/Domains on one server?

I have a dedicated server. I've added a second IP in /etc/network/interfaces. Both domains are working. And both send emails correctly, displaying their respective domain names. My problem is that ...
0
votes
0answers
13 views

fail2ban saslauth ban not working

when I run: fail2ban-regex /var/log/mail.warn /etc/fail2ban/filter.d/sasl.conf output: Date template hits: 8158 hit(s): MONTH Day Hour:Minute:Second 0 hit(s): WEEKDAY MONTH Day Hour:Minute:Second ...
1
vote
1answer
11 views

Configuring postfix to use smarthost

I have an application running on centOS 7, which needs to be configured to send mail(postfix) to a third party SMTP server. I have found that a way to accomplish this is to configure a smarthost using ...
3
votes
3answers
5k views

Postfix “AUTH-LOGIN” no longer being offered for smtp auth after upgrade from Ubuntu 10.04 to 12.04.1

After doing a major Ubuntu dist upgrade from 10.04 to 12.04, my virtual-user postfix / dovecot installation only offers "PLAIN" SMTP Authentication mechanism. It used to offer PLAIN + LOGIN ...
-1
votes
0answers
21 views

Installing a mail server suporting multiple domains on linux using postfix + dovecot [on hold]

I am trying to create a mail server on linux (ubuntu). I have seen some tutorial but most of them does not work, or they "partly" work. I've been trying to use postfix with dovecot. Basically what i ...
6
votes
1answer
1k views

Postfix + sasl method rimap strips domain name from user

I'm setting up a mail server with Postfix and Courier-IMAP. I'd like to do SMTP authentication with rimap, so that I don't have to maintain two user DB's. The problem I'm having, is that the username ...
0
votes
1answer
29 views

Posfix: SASL authentication failed (unbuntu/office 365)

I'm unable to get postfix to work with our office 365 mail. here's the main.cf file: smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no ...
0
votes
1answer
18 views

Postfix 2.11.3 Mail gateway: Recipient address rejected: User unknown in local recipient table

I am trying to recreate a mail-gateway for spam/antivirus-checks on a new debian system (Postfix 2.11.3) coming from an older OpenSuse Installation (Postfix 2.6.5). I tried to test it with "telnet ...
1
vote
1answer
19 views

Postfix - how to prove the error 450 4.7.1 <domain.com>: Helo command rejected: Host not found;

a customer is trying to send me a email but gives in my postfix log: NOQUEUE: reject: EHLO from mail.domain.pt[xxx.xxx.xxx.xxx]: 450 4.7.1 <otherdomain.pt>: Helo command rejected: Host not ...
0
votes
1answer
21 views

Why does SPF_Not_Pass reject on “neutral” result?

I have troubles understanding the default HELO checking policy of policyd-spf. RFC 4408 states in section 2.5.2, that A "Neutral" result MUST be treated exactly like the "None" result But the ...
2
votes
1answer
1k views

Postscreen sometimes stops the mail with 450 4.3.2 Service currently unavailable

I have a problem with postfix sometimes, inconsistently rejecting client mails: Sep 15 09:24:07 mail postfix/postscreen[16209]: NOQUEUE: reject: RCPT from [x.x.x.x]:15037: 450 4.3.2 Service currently ...
0
votes
1answer
28 views

postfix suddenly failed to expand mail aliases

I have used postfix on vine-linux legacy machine names "vine.domain.com (@ 210.251.xx.xx/28)" and have set mailalias on /etc/aliases: mike: xxx_xxxxx@gmail.com for a long time. I have put $...
0
votes
0answers
14 views

Gitlab won't send emails

I have Postfix installed on my server and I'm able to send emails via the CLI using Gmail's SMTP servers. The problem is whenever I try to send an email from the Gitlab website installed on my server, ...
0
votes
0answers
21 views

Postfix rewrite header based on sender and receiver

I have a Postfix and Mailman setup working properly. Now, I would like to configure my system so that every time someone sends an email to requests@domain.org it gets forwarded to the mailing list ...
1
vote
1answer
14 views

Postfix/Amavis 451 4.3.0 : Temporary lookup failure

I am trying to set up a postfix server to prevent spam/malware. The server should reject incoming mail, that is suspicious, otherwise send it on to the actual mailservers which are listed in ...
0
votes
1answer
31 views

Postfix: Unverified Client host rejected / SASL Logged In

Running Ubuntu, iRedMail, Mysql, Amavis, Spamassassin, Dovecot, Postfix Recently had some unauthorized usage of a postfix server internally from a malware deprecated staging server. I worked on ...
0
votes
2answers
43 views

How to identify spamming script

I know this is an age-old question but I've not found a satisfactory answer on how to identify a spamming script on postfix. I know I've to look at the mail logs for postfix, get the message ID and ...
2
votes
0answers
25 views

System reboot results in T_DKIM_INVALID spamassassin

I have installed and configured OpenDKIM in my Ubuntu 16.04 digitalocean vps and enabled the DKIM Plugin in SpamAssassin with loadplugin Mail::SpamAssassin::Plugin::DKIM in one of the .pre files ...
0
votes
1answer
28 views

Problems configuring Postfix to send mail using the Exchange 2013 SMTP server

First I successfully configure a working Postfix configuration to use the SendGrid SMTP to send mails. Now I modify the configuration to use the Exchange 2013 SMTP server to send mail. I have looked ...
1
vote
1answer
22 views

OpenSSL No Client Certificate Presented (SMTP, Postfix)

I used OpenSSL to create a private key and self-signed public certificate. I then created a Certificate Authority file that contains both the private key and public certificate (mail.example.com.pem). ...
0
votes
0answers
12 views

Configure Postfx using external domain

Please tell me, if I have two servers, one does not have a domain name. Can I configure Postfix to send and receive mail at first using a domain of second? And if so, how?
1
vote
0answers
9 views

Prevent misdirected bouncebacks from forwarding server

Note: This question is a duplicate of Avoid creating backscatter on a Postfix forwarding server, for which the only answer was "sorry, nothing you can do", but I provide more detail here, consider ...
0
votes
0answers
9 views

Postfix relay only and also forward credentials

The scenario is the remote SMTP server is slow, so I'd like to set up Postfix as a relay. What I'm trying to do is Users will simply change the server from smtp.exmaple.com to localexample.local ...
-1
votes
0answers
12 views

how to construct a postfix check for an “improper folded header field made up entirely of whitespace (char 09 hex)”

I have a MUA which seems to be capable of generating mails which get rejected by other servers' amavis with the following message: X-Amavis-Alert: BAD HEADER SECTION, Improper folded header field ...
0
votes
1answer
9 views

Mail server - Amavis with 7zip

After 1,5 year with working mail server on Ubuntu 14.04 I've experienced strange amavis logs listed below: http://pastebin.com/RwbNw78f Mail server is: Postfix + Dovecot + MySQL + Amavis + ClamAV + ...
0
votes
0answers
31 views

Postfix - relay - User unknown in virtual mailbox table

I'm trying to make new a local mailserver to our office ( we have poor connection ) with users in mysql . I have some "road warriors" that uses our isp mail server , and rest ( most of them ) are ...
1
vote
0answers
8 views

Email address tagging doesn't work with virtual mailboxes in postfix

I have my own email server, and I'd like to be able to use dynamic email address tagging. I added the recipient_delimiter = +- directive to my config and restarted postfix, but now if I email bob+...
0
votes
0answers
17 views

Postfix vs stunnel relay but outlook client can't sent

I have a problem after setup postfix vs stunnel is relay host: client outlook --->[postfix:25 relay to stunnel:1125]--->smtp.vt.com.vn:465 I can sent email via postfix with telnet command but ...
0
votes
1answer
26 views

postfix user unknown in virtual alias table [duplicate]

first of all - i am still on a beginner level. As the Topic say i have problems with my mailserver (postfix 2.11.3) on Debian Jessie. It is a VPS with two domains and each has his own IP. When i ...
0
votes
1answer
43 views

Postfix Virtual Domain - mail is send by second server [duplicate]

i setup postfix on a VPS with two domains (each one with own ip) domain1 - 194.xxx.xxx.1 domain2 - 194.xxx.xxx.2 when i send a mail via domain2 - i am getting dmarc reports that the mail uses the ...
1
vote
1answer
24 views

AWS with Postfix / Dovecot - Can't access port (25,110)

Currently i have installed Postfix and Dovecot to my AWS Instance. I am able to ping and open dovecot / postfix at port (25,110) at my localhost using: telnet localhost 25 Trying 127.0.0.1... ...
-1
votes
0answers
17 views

Having issues with lmtpd and cyrus in a CentOS server

So, I'm trying to get a simple cyrus server going but my mails keep getting stuck in the mailq. The proper error messages look like this: B6B48113A250 324 Sat Jul 9 17:06:49 user@server.com (...
1
vote
2answers
76 views

Postfix limit total sent per hour

I'm not after services that could provide me with fancy fine-grained control like policyd, I don't need per user/domain control, I only want to: limit maximim number of emails that could be sent ...
0
votes
1answer
42 views

Contact form from ubuntu to Zoho email address

I would like some support in order to get my Postfix configuration working with my Zoho email account. What I am trying to do is to send a message from my contact form in http://www.g3eo.com/#!/...
7
votes
1answer
102 views

Best Practice: notify email sender that their reverse lookup is broken

This probably should be a wiki, not entirely sure. Before I begin, the external server that performs scanning is a custom amavis/postfix/fortigate pipeline; it is suggested that any changes work ...
4
votes
3answers
4k views

Delete from mailq where subject matches

I have a mailq which is getting backed up with multiple emails with the same subject line. I would like to delete all emails in the mailq that match a particular subject line so they don't get sent. ...
0
votes
1answer
116 views

Zimbra Admin Page White Screen

I'm having an issue where my zimbra admin page (https://zimbraurl:7071/zimbraAdmin) is only showing a white page, F12 is giving me this error. I'm running version 8.6.0_GA_1191, I've gone though ...
0
votes
2answers
35 views

Redhat EL 7.2 using postfix to use smtp.gmail.com to relay not working

I am running rhel 7.2, I have postfix installed and can't get it to relay through gmail smtp servers. I have followed lots of tutorials and googled and tried answers to lots of others posts but I can'...
4
votes
3answers
8k views

Postfix : Only receive emails from specific domains?

How can I setup Postfix so that it will only receive emails from specific domains? There's a specific email account on my server that I would only like to be able to receive emails relayed from txt....
0
votes
1answer
14 views

Postfix - Mail only being received for one domain when configured to receive for several

I have postfix setup to receive mail for three domains example.net and example.com. I have this setup with aliases, with an info@ address for each domain both going to a local user, Jason. DNS is ...
0
votes
0answers
23 views

Allow incoming email for specific mailbox only from specific domais/email addresses

here running postfix 2.6.6 I have a specific local email address account that I need it to accept incoming emails only from specific domais/email addresses. All others incoming emails to this local ...
3
votes
1answer
49 views

Why does my Postfix act as an open mail relay, and how do I stop it?

I have a mail server set up with Postifx/Dovecot/MariaDB in CentOS 7. It is somehow configured as an open relay. Do you have any idea how to stop this? Config files below: master.cf # # Postfix ...
1
vote
0answers
18 views

Postfix. Sending some messages using external smtp server and some messages “directly”. Issue with sender_dependent_relayhost_maps

I'm configuring a new web server and i need to make emails from my PHP scripts to be sent. Most messages should be sent using mandrill SMTP and some "directly" from my server to email services. I ...
0
votes
0answers
9 views

Postfix Ubuntu Server 14.04 Some users Local Emails Only

I have been working with postfix Email server for a while seems to be running great, I wanted to implement that some users can only send to their domain (internal emails only) but cannot send outside ...