Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [email-server]

Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.

A list of mail servers can be found on Wikipedia, though sendmail, Microsoft Exchange Server, Postfix, and Exim are the most popular email servers, which together control over 85% of market share for SMTP service.

3029 questions
1
vote
1 answer

Postfix apparently set up but connection is refused

I've set up my postfix server according to this tutorial: Email with Postfix, Dovecot, and MySQL However, I'm getting connection a refused error. The mail queue says mail is coming in, but it is not getting delivered. Mail Queue The mail logs are…
Dave Coventry
  • 41
  • 6
1
vote
0 answers

PHP mail function on Google Cloud Compute Engine?

I have a php website hosted on Google Cloud Compute Engine. I also have a paid Google Workspace account for my emails, etc. I would like to use the mail function in php to receive emails from my contact form. I tried following the steps here:…
user1413341
  • 163
  • 5
1
vote
1 answer

Is an email alias technically the same as a forwarding internally?

I know there are several drawbacks using email forwarders. So I was wondering if adding an alias to an address is the same as adding a forwarder to that email address? It just differs how tools like cPanel displays them? Let's say…
Sam
  • 25
  • 4
1
vote
0 answers

How to enable ESMTP in postfix server

I have setup a posfix mailserver and some of the messages (sent from Microsoft exchange online) are rejected with below error. SMTPSEND.BareLinefeedsAreIllegal; message contains bare linefeeds, which cannot be sent via DATA and receiving system does…
Yasitha
  • 111
  • 4
1
vote
1 answer

Postfix: How to keep an email in the mail queue for further investigation?

Is there any way to keep an email in the Postfix mail queue for investigation/debugging purposes? I want delay the delivery and the email to be kept in the queue which let's me check it's contents. After I've done that I would flush the queue and…
manifestor
  • 6,079
  • 7
  • 27
  • 39
1
vote
1 answer

Postfix: accept all incoming mails and write them to separate files per username

Similar to the following one: accept all incoming emails with unknown name and redirect into a known user with postfix Is is possible to configure Postfix to allow all incoming mails except store them in /var/spool/mail/ based on receiver's…
user8555937
  • 111
  • 1
1
vote
2 answers

Should I use a dedicated IP when sending email from AWS SES?

I have been using AWS SES for a year now for my SaaS. I added DKIM, SPF and DMARC. Yet some people are still not receiving emails. I provide instructions for them to add my domain to their safe senders list. That seems to resolve it. I would like to…
Martin Drapeau
  • 113
  • 4
1
vote
1 answer

What are virtual users for email servers?

I'm currently trying to understand the process of creating a mail server by following this guide, among others. I currently have a website of the form example.tk by way of a Digital Ocean droplet on Ubuntu 20.04 and am attempting to have my mail…
sangstar
  • 53
  • 1
  • 7
1
vote
1 answer

Postfix - Tap all ingoing and outgoing mails and push to socket or script

I want to extend a new Postfix / Dovecot setup with virtual domains and virtual mailboxes (more or less everything in default configuration) by a simple, self-made email archival solution. Therefore I want to make Postfix push all incoming and…
MrSnrub
  • 153
  • 1
  • 3
  • 9
1
vote
0 answers

How to solve '521 5.7.1 Service unavailable; client x.x.x.x blocked using Return-Path'?

How to solve or interpret following error? I'm not sure if anything should be done on client (sender or sending account of a domain) or ask remote postmasters for help. (expanded from ): host …
Jiri B
  • 547
  • 2
  • 15
1
vote
1 answer

Do I need to create a SSL/TLS certificate for a send-only Postfix server which should support outgoing TLS connections?

I'm setting up Postfix right now and it should run as a send-only solution - no emails will be received. But still, TLS should be supported for outgoing emails, so I enabled it using smtp_tls_security_level = may. Postfix has the smtpd_tls_cert_file…
manifestor
  • 6,079
  • 7
  • 27
  • 39
1
vote
1 answer

Managing IP blocking while managing self-hosted mail server

For privacy and long-term support reasons, I am running my own self-hosted mail server from a large hosting company. Unfortunately, using a shared hosting means that I am assigned an IPv4 address that has been blacklisted by an Email Reputation…
Andrei Kucharavy
  • 111
  • 3
1
vote
1 answer

What best practices should be considered when giving a third party access to email for your domain

Our company wants to work with an outsourced 3rd party provider who have the need to send and receive emails. We'd like these emails to come from our domain (or a subdomain) to help customers trust the legitimacy of the emails and reduce the chance…
David
  • 189
  • 11
1
vote
1 answer

Sendmail - retry instead of permanent failure on DNS errors

The last few days, our hosting provider has had occasional connectivity issues with one of their upstreams. Each time this happens, we end up with a heap of outbound emails that Sendmail gives up on. 550 5.1.2 <*********@hotmail.com>... Host unknown…
Hungrig
  • 11
  • 2
1
vote
1 answer

dovecot - changing inbox folder or move inbox mail for one user

I am trying to change where dovecot places new incoming emails from the inbox, to another folder, which i've named PreInbox OR I'd like to move all emails from inbox to PreInbox via cron or something. when running doveadm mailbox list -u ###@###.com…
lemonskunnk
  • 113
  • 5
1 2 3
…
99
100