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
18
votes
1 answer

Configure Postfix to only allow outgoing mail from localhost

How do I configure the Postfix mail submission agent to only allow emails to be sent out from a user on localhost , but allow the Postfix mail transfer agent to receive mail from anywhere?
linus1412
  • 345
  • 2
  • 3
  • 6
18
votes
2 answers

PTR record (rDNS) for multiple domains on a shared IP address

I host multiple domains on a single IP address: cats.com A @ --> 10.20.30.40 A mail --> 10.20.30.40 MX @ --> mail dogs.com A @ --> 10.20.30.40 A mail --> 10.20.30.40 MX @ --> mail I need to set up a PTR record for the IP address. This is so…
dbasch
  • 407
  • 1
  • 5
  • 12
17
votes
2 answers

Setting up SPF and DKIM records of a subdomain

I need to setup SPK and DKIM record for mail.mydomain.com. I have set the following at namecheap - For SPF - Record type :TXT Hostname : mail.mydomain.com Value : v=spf1 ip4:x.x.x.x ~all For DKIM - Record type : TXT Host :…
Aditya Singh
  • 281
  • 1
  • 3
  • 7
17
votes
3 answers

How to collect bounces in postfix

This is related to this question: linux - Ways to get a bounceback report for my newsletter application? - Server Fault Let's say I'm generating email addresses like this when I send out newsletters to identify bounces and unsubscribe them from my…
Brian Armstrong
  • 1,617
  • 3
  • 19
  • 22
17
votes
9 answers

How difficult is it to setup a mailserver?

I want a secure mail solution, as I am looking to move away from Google and other parties looking into my private data. How much of a PITA is it to setup my own mailserver? Should I go for an external provider with a good privacy policy and…
Jacob R
  • 347
  • 2
  • 5
16
votes
4 answers

Is there any way to see if the mail sent by my server was received by the recipient server?

I've sent an important email that the recipient claims it wasn't received by them. They say that they asked their IT team to see if the email was received in their server. According to them the email never reached their server. Also they don't…
belyid
  • 331
  • 1
  • 4
  • 14
15
votes
3 answers

How do I temporarily suspend mail delivery to a specific domain (non-local) with Postfix?

Using Postfix and custom transports I can manage delivery speeds depending on the recipient's domain. (For example, I send max one message per second to *@hotmail.com) I also use similar rules to block bad destinations (htmail.com is blocked right…
Julien
  • 510
  • 1
  • 5
  • 11
15
votes
2 answers

Spamassassin flagged something as spam that is not spam. How do I tell it so?

This is sort of a general question about training spamassassin. I have a newly set up mailserver which filters incoming mail through spamassassin. I recently got a flight reservation flagged as spam (score 5) and would like to tell spamassassin it's…
Nick Jennings
  • 350
  • 2
  • 11
15
votes
3 answers

What is the best method for sending email on behalf of my clients' domains?

I wanted to know the best way to make my mailserver send emails on behalf of my clients' domains, without being greylisted and also avoiding bounce problems. I've been reading some other questions here, here and here but none explores all the…
dgaspar
  • 251
  • 1
  • 2
  • 4
14
votes
4 answers

postfix: connect to Milter service inet:127.0.0.1:8891: Connection refused

I noticed that there is a error with milter if I type service postfix status : Jul 01 17:39:01 mail postfix/cleanup[13921]: warning: connect to Milter service inet:127.0.0.1:8891: Connection refused but what does that mean and how do I fix that? It…
Sarius
  • 171
  • 1
  • 3
  • 10
14
votes
6 answers

How to remove Postfix queue messages sent to a specific domain

I have a server with multiple domains. How can I clear all Postfix queue messages for a specific domain?
Tarek
  • 267
  • 1
  • 2
  • 6
14
votes
2 answers

Benefits of using a subdomain for sending email?

Assume I own the domain name, example.org. I am creating a setup where I receive email sent to me@example.org using Google Apps. The MX records for example.org already point to Google's servers and it works great. Now, I have an application server…
Michael Brook
  • 243
  • 1
  • 2
  • 4
14
votes
15 answers

How to determine a reasonable attachment size limit?

I'll confess this is an area where I'll give it 10-20mb and toss out an "email is not intended for file transfer" whenever a user gripes about having to use FTP. But a shiny new mail server deserves a rational approach... so what is a non-voodoo…
Kara Marfia
  • 7,892
  • 5
  • 33
  • 57
14
votes
7 answers

Do you use postfix or qmail and why

I am setting up a server and I have the choice of installing qmail or postfix. Can someone help me make the right choice. Thing I like to see covered are: - Performance - Ease of setup - security
Saif Bechan
  • 10,960
  • 10
  • 42
  • 63
13
votes
3 answers

Sendmail: Sender address rejected (Domain not found)

I'm running into problems with sending mail on our webserver. Some mails are sent and delivered without any problems (eg Gmail), while others are deferred with "Sender address rejected: Domain not found" I understand that this is a spam protection…
JonoCoetzee
  • 315
  • 1
  • 3
  • 12
1 2
3
…
99 100