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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.

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Is it OK to run my own mail server for email forwarding?

A lot of people advise against running your own mail server; they recommend using a SAS that is more experienced in this area (Google Apps Gmail, AWS WorkMail, etc). I want to run Postfix MTA to forward email from a few custom domains through to…
potato123
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Email Autodiscovery Not Being Probed By Android

Android's default email client is supposed to probe the server for the domain of the user's email address per outlook autodiscovery. This bug seems to indicate that at least the first two steps of that protocol do work. For example, on the first…
user109322
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Relay access denied (in reply to RCPT TO command) Postfix Issue

I am trying to configure my server for email taking reference form this link: SMTP Relaying Outgoing Mail in Postfix - using Webmin. I used Mandrill smtp server in my case. I have also configured a vagrent instance before configuring the main…
salmanwahed
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Reverse DNS does not contain the hostname error from MXToolBox

I am not sure where I have gone wrong in my configuration but I am getting the error Reverse DNS does not contain the hostname for my domain sparkdojo.com I had the hosting company set the PTR record to host2.sparkdojo.com and all of the tests I…
CodeKing
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Can a backup mx server be configured to reject email submissions if it can connect to the primary mx?

I know that one technique spammers may use is to send spam to a secondary mail server, since those servers tend to be less powerful and may not have all the spam filtering that the primary has. Can I set up my backup mail servers to reject any…
Stephen S
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What to do if one doesn't want to receive email bounces?

Background—the standards RFC 5321 §4.5.5 states: All other types of messages (i.e., any message which is not required by a Standards-Track RFC to have a null reverse-path) SHOULD be sent with a valid, non-null reverse-path. For the avoidance of…
eggyal
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Configure exim4 to use Microsoft Exchange as smarthost

My company has set recently set up an Active Directory driven Microsoft Exchange environment to consolidate outgoing mails. We do have a set of staging servers which should now use our MSEXCHG as smarthost for outgoing mail. These servers are…
Christian Kiewiet
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How to rate limit outgoing SMTP connections for Postfix

I have a postfix instance running on a VM. The VM provider shuts us down if we exceed a threshold of SMTP connections per minute - something like 10. In a typical day we might send 1000 messages, so 10 is fine. However it is a mailman server so…
Russell Stuart
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How to stop or prevent Postfix / smtpd / Sasl brute forcing

There are numerous attempts to connect to my mail server in order to send mail either unauthenticated or to guess username and password to, I suppose, accomplish the same. Should I fight against that, just like in ssh case, and how? Just a note: I…
Miloš Đakonović
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Setting up a postfix email server

When I set up an email server using postfix on ubuntu server, how do I make sure that it won't be an open relay??
fnord_ix
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saslauthd multi instance for postfix smtp authentication

I have mail server Postfix+Saslauth. I configure multiple instance for Postfix: postfix postfix-out and two instances for saslauth: saslauthd saslauthd-out Setting saslauthd is for authenticating Postfix service and saslauthd-out for another…
superuser
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Debugging sendmail - dsn=5.0.0

I am getting alot of the following messages from an ISP when sending out emails. Is there any way to get more information from these ? Users are reporting that they are not receiving any emails? Jul 5 17:02:50 smtp sendmail[11239]:…
Diden
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Lightest weight IMAP/POP3 server

I'm looking for an extremely lightweight mail server to handle IMAP/POP3 connections. Maildir backend preferably, with multiple authentication modes (SQL, LDAP, etc). Any suggestions?
Glen Solsberry
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How to find emails sent,deferred, bounced with logs on exim mail server?

I am new to exim mail server. Now i need to findout the number of sent, deferred , bounced emails through logs. Since in postfix I will do things through grepping. Is there any way to find in exim through grep command. Your help is greatly…
karthick
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Maillog help - ' removed '

I'm seeing some strange behavior from the maillog while tailing it and I'm wondering how to know if it a hack, whereby bad emailers (spammers) use legitimate mail servers behind the scenes to send their spam. This will obviously end up getting the…
landed
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