Questions tagged [postfix]

Open source email server for Unix

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32 views

is the security team allowed to hack source of spam email? [closed]

the options in most classical ways of dealing with spam are report spam, report phishing. i,ve tried feedback to addresss spam issues . its impossible to erase some website accounts. the advice is ...
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Do Cron Job need MTA when sending email with PHPMailer

I'm using CRON Job to send an email alert to the user when it is near the submission due date. But when I want to test it with sending a simple email first, it keeps showing (CRON) info (No MTA ...
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23 views

Postfix — virtual_mailbox_domains are rejected

I am running Postfix 3.4.13 on Ubuntu 20.04. How I broke it: I tried to configure virtual mailboxes for each subdomain (main.cf and referenced files listed in full lower in this post). I removed @...
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320 views

APT update encounters an error configuring postfix after upgrade to 21.04

I have upgraded from Ubuntu 20.10 to 21.04 and now when I run: sudo apt update sudo apt-get upgrade I get this error below related to PostFix. How can I solve this problem? Hit:1 http://archive....
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help configuring rspamd to be used from remote postfix

Good day! my postfix is in different host from my dovecot and rspamd, and everytime a mail comes the postfix will deliver it to my dovecot. Now I am having a hard time configuring my postfix to use ...
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2answers
185 views

Send email via gmail, without other mail server, with postfix

I am inexperienced in configuring mail systems. I am using Ubuntu #54~20.04.1-Ubuntu. How can I configure my computer to send emails using a gmail account, with postfix? I mean not to have any other ...
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498 views

Which option (“internet site”, “internet with smarthost”, “satellite system”) should I choose in postfix configuration?

When I attempt to install postfix on my home desktop system, I get a configuration dialog with the following options1: No configuration: Should be chosen to leave the current configuration unchanged. ...
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16 views

postfix 3.4.13: skips ldap lookup & skips lmtp delivery

Having trouble while setting up a new server with Ubuntu 20.0.4, postfix, openldap and kopano. Incoming mail is delivered to local mailbox instead of being delivered via lmtp to kopano. Did research ...
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23 views

OVH VPS Postfix can't receive external emails

I hope this is the right place where to ask for this kind of stuff, If not, please let me know. I'm pretty new to mail server in generals, I bought a VPS from OVH services for other needs and decided ...
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35 views

I created a mail server using postfix and dovecot on ubuntu 20.04 but my mail goes to spam

I created a mail server using postfix and dovecot on ubuntu 20.04. I'm using a valid trusted SSL certificate from let's encrypt, but my mail goes to spam on Gmail and other mail services. I'm sending ...
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27 views

MySQL 5.7 ENCRYPT(str,salt) (Deprecated now) vs. MySQL 8.0 SHA2(str, hash_length)

I have got an Ubuntu Sever 18.04 running Postfix + Dovecot + ... MySQL 5.7 is installed to contain user password hashes by using strong salt. MySQL 5.7 ENCRYPT(str,salt) has been used to generate the ...
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1answer
26 views

Should I stop services when performing release upgrade?

Should I stop services like mysql and postfix before performing release upgrade(from 18.04 to 20.04)? Is there a risk of data loss/corruption if I don't?
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27 views

Error were encountered while processing Postfix mailutils in ubuntu 18.04 VM on vmware workstation 10

dpkg: error processing package mailutils (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a follow up error from a previous ...
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42 views

postfix error connection

my postfix not connect in the lan just localhost and local ip address: In the postfix server: :/etc/postfix$ telnet 172.28.204.36 25 Trying 172.28.204.36... Connected to 172.28.204.36. Escape ...
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php7.4-imap Installed on Ubuntu 16.04 But imap_open() is not working and also says php7.4-imap doesn't exists

We have PHP 7.4 installed and want to integrate IMAP to receive emails. Also installed php7.4-IMAP but still imap_open() not responding. When trying to enable IMAP showing an error like the module ...
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1answer
50 views

rsync log file gets corrupted when using nano editor or mail ( postfix ) command

I have a strange situation where I am re-directing the whole output of an rsync command to a file and the file gets corrupted if I open it with nano editor or if I send the output to outlook mail. If ...
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263 views

Ubuntu 20.04 with postfix + OpenDKIM, not sign my emails

I've configure Postfix + OpenDkim in Ubuntu 20.04 server, and has a problem. Postfix not sign emails, with silent work, not logs with errors. Postfix main.cf smtpd_banner = central.mydomain.com ESMTP $...
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45 views

Deny smtp connection from unknown and unverified hosts with hosts.deny

I need to reject all smtp connections whose host name is unknown or does not match its address. Have tried setting in hosts.deny: smtpd: UNKNOWN smtpd: PARANOID but Postfix logs show that they are ...
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2answers
100 views

Setting up a postfix server on a homenetwork via the noIP service for full-time use

I'm trying to learn about linux and network administration, so I'm not especially concerned if this is not the most efficient way to do things. I have a server at home running Ubuntu 20.04. I've set ...
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1answer
303 views

Postfix Send-Only SMTP Server domain name configuration

I found 2 ways of sending mails from Linux/bash : through a service , like sSMTP, which implies using an external SMTP server, like gmail through Postfix server, which configures the Linux server to ...
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135 views

Smtp error (454) authentication failed

Ubuntu 20.04 contabo VPS virtualmin/webmin panel postfix+Dovecot domain is redirected from cloudflare- maybe missing any records (not sure…) A mail ip address A webmail ip address MX ...
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87 views

Opendkim Key Not Secure

Ubuntu 20, cannot get opendkim-testkey to pass for the life of me. Checked all dependencies, configs numerous times, any help appreciated. --------------------------------------------------------------...
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1answer
133 views

Ubuntu 20.04 Mail Setup Setting the Default From Address

I am setting up my mail server using this chapter of a setup guide https://www.linuxbabe.com/mail-server/setup-basic-postfix-mail-sever-ubuntu. When doing a simple test to make sure postfix will send ...
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27 views

Why doesn't Sylpheed work with my return address as “kline@thought.org”? I seem to need “kline***@gmail.com” that I've forgotten

I have hacked "mutt" to fit my typing disabilities, but it fails on my mail computer. I'm looking for a simpler mail text-only mail program. "Mutt" seems to be busted and my self-...
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1answer
49 views

Installing Apache Mod_Evasive without installing Postfix

On Ubuntu 18 I'd like to install Apache Mod_Evasive but without installing Postfix. In fact, I'm using msmtp as a simple way of connecting to a remote smtp server to send out mail, so I don't need a ...
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52 views

POSTFIX: Mail Transfer To INBOX Issue

So I have just successfully set up a Postfix/Dovecot server without a hitch until the very last step (OF COURSE) which is the IMAP client. Mail is being received by Postfix as indicated in the mail....
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53 views

What DNS Records should I put to configure postfix?

I am following this guide: https://www.vultr.com/docs/how-to-install-postfix-dovecot-and-roundcube-on-ubuntu-20-04 to install postfix, dovecot, and RoundCube on my azure ubuntu VM. I know it is for ...
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141 views

Postfix aborts installation after upgrade to 20.04

I cannot install Postfix on Ubuntu 20.04 after upgrading from 16.04 and previously using sendmail. The output below occurs while attempting to install Postfix using apt: Job for postfix.service ...
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968 views

Disable IPv6 on Ubuntu 20.04

Simple way that worked for a very long time was adding in /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 Afterwards ...
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128 views

Postfix is sending SPAM and I don't know why

My server is sending spam through the whole world since yesterday and I don't know why. It looks like phishing mails for netflix. grep -H -i "sent" /var/log/mail.log has this entries /var/...
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error opendkim service linux ubuntu 16.04

how can i fix this error in opendkim? root@mail:~# tail /var/log/syslog Dec 10 17:14:04 vanttage opendkim[25539]: OpenDKIM Filter: mi_stop=1 Dec 10 17:14:04 vanttage opendkim[25539]: OpenDKIM Filter ...
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1answer
482 views

Postfix can't send mails to gmail - sender non-delivery notification

Having some troubles sending mails to gmail with Postfix. Below is my log: Nov 24 15:07:02 ubuntu-4gb-fsn1-1 postfix/pickup[101539]: 4C99C4225A: uid=33 from=<www-data> Nov 24 15:07:02 ubuntu-4gb-...
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Problems with postfix tls

and thanks for answering to my questions. I have installed postfix on Ubuntu 16.04. I have tried to configure the main.cf and everything seems to be fina. But I check /var/log/mail.log and I see that ...
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112 views

Thunderbird 78 on Windows stopped working (getting email) with my Ubuntu 18.04 Postfix/courier (sending still works)

One of my customers just upgraded his Thunderbird installation to go to the latest version which at this time is 78.4.0. Since then he can't access my Postfix mail server to view his messages. However,...
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62 views

I am setting up raspberry Pi as cctv camera. Trying to setup email service to send videos to my gmail

I have successfully setup Postfix as a SMTP server and add the service to my gmail with App Passwords. This is working and I am able to send emails. But there is no attachment options in Postfix. ...
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1answer
113 views

postfix nothing send email port 25

I am trying to configure the Postfix Mail server. Ready I made the configuration in postfix and devecot (imap / pop). I can receive emails on my server, but I can't send emails to other servers. im ...
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22 views

postfix header_checks forged FROM

I want to block incoming FORGED mail with double e-mail address in FROM. It works OK, but it should be a little finetuned. I don't want to block mails where the Name field is equal to the emailaddress....
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33 views

Emails going straight to SPAM folder

So I've set up my own mail server with iRedMail on Ubuntu (20.4 I believe) to host my virtual boxes for my domain email accounts that are created as the admin, and Roundcube to send and receive the ...
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1answer
71 views

DNS Records Configuration - Going Straight to Spam Box?

I know that in order to hit the inbox, the main DNS records need to be properly set up. These are the main DNS records that every mail delivery system should have for their domain: TLS A MX DKIM SPF ...
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164 views

NGINX NOT properly set up with iRedMail installation - 502 bad gateway error

OS: Linux Ubuntu 20.04 Web server: NGINX Database: MariaDB The installer ran on the command line I have already made the necessary configuration prior to the installation: Set DNS records (A & ...
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57 views

Roundcube 1.4.3 Password Plugin Not working or can not make it work on UBUNTU 20.04

I am facing a problem fixing roundcube password plugin. I prepared my mail server using postfix, dovecot & roundcube on ubuntu 20.04. I configured dovecot virtual users and users list is at /etc/...
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35 views

Prevent postfix mail.log from filling up my server

I was having trouble with my server being used as a smtp relay. I think I fixed that, but now what happens is my mail.log fills up. Apparently, postfix is blocking the mail, but it is writing to the ...
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242 views

Postfix Mail sever : Unable to read banner ( Email sent failed, Gmail)

-1 I am new to Email adminitration. I used the instructions for a mail server from https://www.exratione.com/2019/02/a-mailserver-on-ubuntu-18-04-postfix-dovecot-mysql/. The only changes I made was ...
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313 views

Postfix server: The recipient server did not accept our requests to connect. unable to read banner

I have used Postfix and Dovecot to make an email server on my Ubuntu 18.04 system using the tutorial (https://www.exratione.com/2019/02/a-mailserver-on-ubuntu-18-04-postfix-dovecot-mysql/) Note:- I ...
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244 views

ZFS's ZED not sending an emails

Having some issues on Ubuntu 20.04 with email notifications using zed. have postfix and mutt working, can send using mutt at CLI fine. When i run a zpool scrub i don't get an email. can't see any logs ...
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38 views

Logcheck sent email getting rejected because address is not verified

I am unable to send emails using logcheck as they are getting rejected because email address is not verified. I am using AWS SES and postfix. I see below in the mail log Sep 22 11:30:53 ip-172-112 ...
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16 views

attacs on postfix-sasl

We run a server 18.04 It has a webshop installed and nothing else. Postfix is started because it is needed for the shop to be able to send out mails. No mail accounts configured. I can see in fail2ban ...
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31 views

Undelivered Mail Returned using mail -s on bash

first off I'm using Ubuntu 20.04 and the following script to test sending mail from the command terminal: #!/usr/bin/env bash for name in *.txt do find | grep *.txt >> namefile.log done for ...
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Postfix - disabled notifications for 535 5.7.8 Error: blocked

I have an anti-spam system based on 'postfix'. When someone sends an email and is blocked by a blacklist, they get feedback. Example: This is the mail system at host mail.xxx.com. I'm sorry to have to ...
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1answer
109 views

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 ...

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