Questions tagged [postfix]

Open source email server for Unix

Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. It is intended as a fast, easier-to-administer, and secure alternative to the widely-used Sendmail MTA.

The Postfix Home Page: Home page for Postfix, contains up to date documentation, Howtos and FAQs, and a great deal more useful information.

Ubuntu Community Help Wiki - Postfix: Very detailed Ubuntu-centric information on the setup of Postfix.

738 questions
0
votes
1 answer

Dovecot returns a hash mismatch after setup

So I had a working setup with postfix and dovecot with virtual users stored in a postgresql db on an Ubuntu 18.04 VPS. I've decided to make a new setup on a VPS based on the same settings (that I followed mostly from this guide…
ausced
  • 21
0
votes
1 answer

530,5.7.0SMTP server error: MAIL FROM command failed Detail: Authentication Required

PHP Mail error with the message: 530,5.7.0SMTP server error: MAIL FROM command failed Detail: Authentication Required Following are the key sections of my PHP Script. new PHPMailer(true) Host as 'smtp.gmail.com'…
Naren
  • 1
  • 1
0
votes
1 answer

Configuring DKIM over Postfix (iRedMail-1.3.1) in Ubuntu 18.04

In order to have my mail server deliver mail to Microsoft, Gmail and Yahoo users I need to configure DKIM. I am following this Debian guide: https://wiki.debian.org/opendkim . I wrote a script to do most of the work, though editing of config files…
Spirited Warrior
  • 1
0
votes
1 answer

Ubuntu Server 20.04 and Postfix: configure SPF for a subdomain return error: spf=neutral and all emails marked as spam

I'm trying to set up Postfix in Ubuntu Server 20.04 as an email sender (I don't need to receive emails) in my subdomain server. I have the main domain that works with one server, and a subdomain that works with another server (with a different…
MarGraz
  • 171
0
votes
1 answer

store emails in cifs mounted filesystem for a postfix Maildir mailbox type

I have a cifs mounted filesystem and I will like to know, does sudo postconf -e 'home_mailbox = Maildir/' mean that Maildir is chosen as default mailbox format or it just specifies a directory where an email is meant to be stored?
drecute
  • 161
0
votes
1 answer

SquirrelMail - Error: Connection dropped by IMAP server

I am trying to use SquirrelMail on Ubuntu 16.04. When I go to localhost/squirrelmail/src/login.php and login, I encounter the error message: ERROR: Connection dropped by IMAP server. I tried the solution here , which says to add in…
paperangel220
  • 710
  • 10
  • 26
0
votes
0 answers

Reverse DNS Lookup Not Functioning Properly

I recently set up a server running Ubuntu 18.04 Server on my local network in a DMZ. I am trying to run it as a mail server, among other things. I had been running a mail server on a desktop PC on the same local network. When I try to send mail from…
Jeffrey Rolland
  • 51
0
votes
1 answer

Postfix Can Send But Cannot Receive Mail, Port 25 is Filtered

I seem to have a problem with port 25 inbound connection. My ISP confirmed that port 25 is open. Yet, when I tested with nmap, I get the following results Testing nmap with public IP shows port 25 is filtered Testing port 25 using the local IP of…
VWijaya23
  • 1
0
votes
0 answers

Ubuntu 18.04 LTS unattended-upgrade killed my mail

OK, I have Kolab 16 as my mail package on top of a fresh install of ubuntu 18.04 LTS. Kolab (v16) includes clamav, roundcubemail, postfix, amavis and some other bits to tie it all together. It's worked rather well until two days ago when I got an…
Tom Friend
  • 21
  • 3
0
votes
1 answer

SSL Question - about "Unknown Authority"

I went to sslforfree gave my csr info to them and I recieved 2 files from them: 1. ca_bundle 2. certificate.crt I also have my original mydomain.key & the mydomain.csr I then put my .key and certificate.crt files in the exact same places you'll also…
jferron701
  • 1
0
votes
2 answers

How do I get rid of errors and warnings in /etc/mail.log pertaining to a defunct mailman installation?

I have an Ubuntu 18.04 LTS server that at one point in time was set up (not by me) to run GNU mailman , using Postfix as the MTA. I no longer run any mailinglists on this server, and have ‐ to the best of my ability ‐ tried to remove and purge Gnu…
Free Radical
  • 449
  • 1
  • 7
  • 21
0
votes
1 answer

Postfix SASL LOGIN: 535 5.7.8 Authentication failed: wrong user/password

I was trying to set up my postfix email server (mailclient --> postfix/relay host --> smarthost/mailprovider) and got the following errors when sending mails: luke postfix/smtp[9059]: < smtp.strato.de[81.169.145.133]:587: 535 5.7.8 Authentication…
Roete1958
  • 1
  • 1
  • 1
0
votes
0 answers

mail problem with Postfix: (Outgoing) Connection timed out

I installed Postfix on Ubuntu 18.04 lts and try to send mail with the PHP mail function. What I get in the mail.log follows. Can anyone see a problem in the log output? Jan 27 16:27:23 dv7 postfix/pickup[16608]: 42333FA29A3: uid=33 from=<www-data>…
E. Porter
  • 91
0
votes
1 answer

Postfix Relay Access Denied But Spam Still Being Sent?

I am running a Postfix mailserver on Ubuntu 19.10 and have mynetworks set to localhost so any attempts to relay email are blocked - i.e.: telnet emailserver.com 25 helo testing.com mail from:<test@testing.com> rcpt to:<someone@gmail.com> 554 5.7.1…
Robin Wilson
  • 241
0
votes
1 answer

Configure a simple send-only mailserver for system mail?

I'm running a cloud VM (18.04), and I'm trying to get emails from unattended-upgrades . Can someone tell me the easiest way to get these emails forwarded to me? I've tried several guides for postfix and sendmail , and none of them have managed to…
James Walters
  • 21
1 2 3
…
49 50