Questions tagged [postfix]

Postfix is a free and open-source mail transfer agent (also "MTA"), written in 1997 and still actively developed.

Filter by
Sorted by
Tagged with
0
votes
0answers
25 views

Postfix Dovecot Pi server cant connect to email client even though it can send and receive emails

I followed the sam hobbs tutorial for setting up a postfix dovecot email server on a pi and with quite a bit of research and trouble i got my pi server running (can send and receive emails), but i ...
0
votes
0answers
22 views

Virtualmin - Postfix NOT encrypting with TLS

I set up my server, and everything is working, emails included. But every test I have ran indicates that my emails are not getting encryped with TLS. Gmail says it's not, and checktls says it's not. ...
0
votes
0answers
12 views

how to keep original address when forwarding with postfix

Running Centos 8 with postfix. Sending and receive email fine. But now I want all incoming mail to be forwarded to a gmail account. I have added these lines to main.cf: virtual_alias_domains = wb0oew....
0
votes
1answer
43 views

postfix in docker cannot resolve hostname of relay host

My postfix instance running in a docker container seems to be unable to resolve the hostname of my relay which is outbound.mailhop.org (formerly Oracle and now owned by DuoCircle). Relay fails with ...
0
votes
0answers
13 views

Forwarding deferred mail to different mail server

We have commissioned a new mail outgoing mail server that sends notifications to users. Since we need to warm up the server (gather IP reputation) and still not loose emails I was wondering if anyone ...
1
vote
1answer
47 views

Roundcube issues after server upgrade (Debian 10, PHP7)

I have upgraded my DigitalOcean droplet from Debian 8 to Debian 10, as well as upgraded PHP from PHP5 to PHP7.3. I also upgrade RoundCube to 1.4.2. Everything seems to work fine. I see no obvious ...
0
votes
1answer
103 views

How can i view mail using doveadm?

I have mail sent to my dovecot inbox and I can see that there are unread emails. If I run: doveadm -f table mailbox status -u bob all INBOX I get: mailbox messages recent uidnext uidvalidity unseen ...
0
votes
1answer
46 views

postfix on the cloud without mydomain

I'm trying to make postfix server on a cluster (docker swarm). The postfix main.cf configuration needs mydomain but I'm not using a dedicated machine to domain name. I have 10 machines and 6 domains. ...
0
votes
0answers
9 views

Handling expired mesages in Postfix

I am administering a mail server that receives mail from our own applications and delivers them to our users. Unfortunately there are sometimes some addresses in the system that don't exist (anymore). ...
0
votes
0answers
22 views

postfix running but not accessible

I've got postfix running (or so it seems) on my Debian 10 system: user@leah ~ # service postfix status ● postfix.service - Postfix Mail Transport Agent Loaded: loaded (/lib/systemd/system/postfix....
0
votes
0answers
172 views

How to blacklist or reject external mail ids in fetchmail delivery?

We have configured fetchmail to fetch mails from catchall server and delivering to domain ids. If we send mail to online domain user c@a.com along with local zimbra user a@a.com and b@a.com means ...
1
vote
0answers
21 views

Postfix + Cyrus not working

I have a problem. I have configured postfix for run with cyrus, and it's still not working. /var/log/mail.log Nov 29 10:44:24 mail postfix/submission/smtpd[32229]: connect from out.example.com[xxx....
0
votes
0answers
88 views

Postfix fallback to another SMTP in case of blacklist

I am managing a postfix+dovecot mail server with a few hundred email accounts. We are doing our best effort to filter spam and viruses in inbound as well as outbound emails. Nevertheless, it happens ...
0
votes
1answer
39 views

bash: printf to email Fails, Redirect Succeeds

When I pipe the output from printf to mail, the email does not get sent. When I write the output to a file and redirect input from the file, it works. e.g. I have a bash script with the following: ...
0
votes
1answer
222 views

Relay access denied with postfix when receiving mail

Introduction I recently installed postfix 3.3.0 on an Ubuntu 18.04.3 LTS virtual machine. To test the installation, I am using out-of-the-box configuration, which means I did not change anything yet....
0
votes
0answers
14 views

Postfix mail server: When smtpUseSSL=true at mail client, the SASL auth is ignored

Configured postfix server with sasl auth enabled. Could configure the mail client and send emails through server when user/pass is correct and emails won't be send when user/pass is incorrect. So ...
0
votes
0answers
31 views

Rainloop Won't connect to user account

Hello, First of all, i am currently testing postfix and rainloop for mailserver. I know that there are some security issues when trying to run your own mail server. But i just want to do it for the ...
0
votes
2answers
70 views

what's the difference between using RBLs and anti-spam software?

My doubt is, is it too different to use RBLs instead of anti-spam programs? (like SpamAssassin) I've a Postfix + Dovecot server with some RBLs in Postfix, and disabled SpamAssassin because it was ...
1
vote
0answers
38 views

Postfix is forwarding/relaying spam

I have an Ubuntu 16.04 machine with Postfix 3.1.0 and virtual mailboxes (iredmail). I'm using postscreen (with a local Bind server), Amavis with ClamAV and SpamAssassin. The amount of received spam ...
2
votes
1answer
75 views

Linux Mint Postfix connection refused

I'm trying to create a server on Linux Mint (Cinnamon 19.2) for HTTP (Apache2, Mysql5.7, PHP7.2), FTP, and Email (Postfix, and evetually Dovecot and SquirrelMail or RoundCube, but after I get Postfix ...
1
vote
1answer
155 views

Make postfix use sasl / auth plain for outbound mail to a relay server

My postfix does not send AUTH PLAIN to the outgoing relay server. It must have worked a couple of days ago, but now I get "relay not permitted" bounce mails. The mail system runs in an Alpine Linux ...
0
votes
0answers
28 views

Dovecot sieve filter `address :is “to”` not working if part of mailing list

I have a catch-all email address and a dovecot.sieve rule to filter all mails to one address (muh@my-domain) as I receive only spam on this address: if anyof (address :is "to" "muh@xxxxxxxxxxxxxxx.de"...
0
votes
0answers
120 views

How do I force Postfix to use port 465 or 587 for outgoing mail

I have setup a Postfix server, but my ISP blocks port 25 outbound so I want to setup my mail server to use some other port for communication with other mail servers. Is there any way to do this?
1
vote
1answer
213 views

Postfix issue on Ubuntu (Amazon EC2): can not send email after a few success

I installed Posifx on Ubuntu 18.4 LT on an amazon EC2 box. After installation and configuration, I was able to send out two emails to my hotmail and another email account. I do received them. However, ...
0
votes
0answers
50 views

Roundcube not parsing HTML emails

Hi i have a problem with my self-managed roundcube webmail. All emails received are not parsed in HTML and appears blank. Only when open in plain text mode can see the contents. I have tried to ...
1
vote
1answer
84 views

Postfix/Dovecot mailserver with neomutt

I set up a mailserver on Archlinux with Dovecot and Postfix. I setup a Domain including SSL, MX records, DMARC etc. Everything works fine except that I have trouble using it in Neomutt. To add the ...
0
votes
1answer
430 views

How connect Dovecot with Postfix in docker-compose

I made mail server with this tutorial. Everything works, but I want to put mysql, postfix and dovecot in containers. I used mysql image. I made Postfix container for my own. I have no problem ...
0
votes
0answers
14 views

How to configure two “from” email with Postfix configured with Office365

I configured the Postfix to send email via Office365 following this tutorial It's working fine. But I want to send email from two different email adresses. For example, ClientA will received an email ...
0
votes
1answer
148 views

SMTP Open Mail Relay vulnerability

I have to check if my server (SUSE 11) is used as an SMTP Open Mail Relay and, if so, block this unwanted feature. I check /etc/postfix/main.cf and all relay's related variables are commented : #...
0
votes
1answer
168 views

postfix stopped working after fail2ban

Since yesterday my Postfix stopped working: It doesn't receive any e-mails anymore (from other email addresses, not my own). There's nothing in mail.log or mail.err. Yesterday I installed fail2ban on ...
0
votes
0answers
96 views

postfix smtp server initial server greeting error

I've installed postfix in centos and attempted to send an email but I get the error 'Lost connection while receiving the initial server greeting'. The error occurs with gmail, hotmail and my work ...
0
votes
0answers
18 views

Postfix virtual users on mysql how to block login to account

I have Postfix / courier / virtual mysql email accounts I need to block access to user account without changeing their passwords on virtual mysql table. How can be simplest done?
0
votes
0answers
145 views

postfix timeout to send emails to gmail on port25

I am trying to setup postfix on ec2 amazon linux 2 instance. While trying to send messages to gmail or corporate email, it is timing out Sep 10 18:52:45 postfix-xxxxx postfix/smtp[4001]: xxxx: to=, ...
0
votes
1answer
54 views

Postfix: how to stop postfix or Ubuntu sending emails to Gmail and getting a 421-4.7.0 error

I have an Linux server (Ubuntu) in which, while setting it up, I entered my gmail address. So now, each 5 or 6 minutes, gmail servers respond to my server with the following message (appearing in the ...
0
votes
1answer
64 views

General type of Postfix mail configuration

During Postfix installation I configured General type of mail configuration. How check this configuration after intallation?
0
votes
0answers
160 views

Configuring SMTP for Sharelatex and sending emails from inside a docker container

My aim: I want to have a sharedlatex instance on my VM with Ubuntu 18 and sharedlatex should be able to send mails. Status: Sharedlatex is already running in a docker container but I have to ...
0
votes
0answers
90 views

Gmail as a SMTP outgoing mail server used in Postfix. Max limit is 100 emails a day. What is yahoo's or outlook's smtp max send limit?

I'm using gmail as an outgoing smtp server in my Postfix config in my server. The max limit is 100 emails sent per day. What is yahoo's and outlook's? Or is there another service that can do more than ...
0
votes
0answers
39 views

What is smtp-relay.gmail.com send limit in 2019 when used as a POSTFIX mail sender?

There's no official google statement where they state on how many emails can be sent through smtp-relay.gmail.com when using it as the main mail sender in a POSTFIX server. Many of the reports before ...
0
votes
0answers
39 views

Why doesn't Postfix receive mails from the major mail services?

I cannot receive messages from iCloud, Outlook or Gmail, but I can when I remotely telnet on port 25 or send a test message using https://www.wormly.com/test-smtp-server I receive the message in my ...
1
vote
0answers
27 views

Postfix flush changes messages date

I'm using postfix with dovecot as smtp/imap server stack. Quotas are configured in dovecot for users, but i'm facing a date problem: When messages are kept in postfix queue, frequently cause of imap ...
0
votes
0answers
170 views

ERROR “mail transport unavailable” after integrating SpamAssassin with Postfix on CentOS7

I am using Postfix 2.10.1, Spamassassin 5.16.3 on CentOS 7. PROBLEM: Postfix stopped sending and receiving mail. /var/log/maillog displays the two lines: Aug 3 18:56:15 myServer postfix/error[...
1
vote
1answer
80 views

Postfix Header_Checks Reject Legitimate Mail (CnetOS 7 + Postfix 2.10.1)

I use Postfix to block terms in headers and bodies. In few cases, it blocks legitimate mails because the term used is present in a long string (probably an id or reference or a coded string). For ...
0
votes
1answer
10 views

Showing postfix settings on linux

I wanted to see if anyone else knew the answer to this as my googlefu is failing today. I am trying to see the configured settings on a linux/centos server running postfix for it's email usage. I ...
2
votes
1answer
409 views

Adding custom schema to openldap

I want to setup my postfix with ldap authentication. I follow this tutorial https://blog.tnyc.me/postfix-with-ldap I need to setup a PostfixBookMailAccount but therefore i need to load that schema. I ...
0
votes
0answers
12 views

Why Roundcube Returns “login failed” Although I Entered Username/Password Correctly

I bought a VDS and installed the Centos Web Panel. After the installation, I upgraded to the pro version. I have completed setup reverse DNS records and other configurations. All mail and system ...
0
votes
0answers
394 views

Postfix setup for Raspberry Pi 3B+ (non-dedicated mail server, fantasy FQDN)

Problem: Create a contact form that lets users of a website submit messages that are sent to an email. Use php's mail() and Postfix. Having trouble using/understanding Postfix? The setup must be ...
3
votes
1answer
80 views

attack via executable line after plus sign in email address

I operate my own mail server and from time to time, people send spam or mysterious stuff to the root account. Recently, I got an empty mail, which was addressed to: root+${run{x2Fbinx2Fsht-...
0
votes
0answers
29 views

Postfix validation of mail originating in G-suite

We use g-suite to host user accounts for our domain, but we also have a linux server in the cloud running postfix which handles various programmatic endpoints ( mail addresses which do clever things ...
0
votes
0answers
54 views

Mail is not working on debian server - Outgoing SMTP “Connection timed out”

I have Debian 8 VPS and websites running on PHP 5.6, using Cloudflare DNS servers. I tried to install sendmail and postfix, but sending mails is not working, even through the CLI. I can see syslog I ...
0
votes
0answers
62 views

Roundcube refuses to connect

We have a in-house mail server running CentOS using Postfix and Dovecot. This server has been working for over 2 years with little or no issue. We can connect from our workstations using Thunderbird ...

1
2 3 4 5
10