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Revision as of 02:15, 22 August 2012 by Chrisl (talk | contribs) (Still unfinished! Ok, first version here. Sendmail documentation tends to be somehow hard, so I want to create a very KISS article here. Still missing stuff, like how to add mail-only accounts. Any (KISS) help is welcome)
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Sendmail is the classical SMTP server from the unix world. It was originally coded long time ago, when the internet was a safer place, and back then, security didn't matter as much as does today. Therefore it used to have several security bugs and it got some bad reputation for that. But those bugs are long fixed and a recent sendmail version is as safe as other SMTP servers. If your top priority is security, you should probably use netqmail, however.

The goal of this article is to setup Sendmail for local users accounts, without using mysql or other database, and allowing also the creation of mail-only accounts. This article only explains the required steps configuring Sendmail; after that, you probably want to add IMAP and POP3 access, so you should install Dovecot.


Install the package sendmailAUR from the AUR.

DNS Records

You should have a domain, and edit your MX records to point your server. Remember some servers have problems with MX records pointing to CNAMEs, so your MX should point to an A record instead.


  • Create the file /etc/mail/ with the following content:
dnl FEATURE(`relay_entire_domain')dnl
FEATURE(`virtusertable', `hash /etc/mail/virtusertable.db')dnl
  • Then process it with
m4 /etc/mail/ > /etc/mail/


  • Create the file /etc/mail/local-host-names and put there your domains:


  • Create the file /etc/mail/access and put there the base addresses where you want to be able to relay mail. Lets supose you have a vpn on, and you want to relay address from any ip from there:
10.5.0 RELAY
127.0.0 RELAY
  • Then process it with
makemap hash /etc/mail/access.db < /etc/mail/access


  • Edit the file /etc/mail/aliases and uncomment the line #root: human being here and change it to be like this:
root:         your-username
  • You can add aliases for your usernames there, like:
coolguy:      your-username
somedude:     your-username
  • Then process it with


  • Create the file /etc/mail/virtusertable and put there aliases that includes domains (useful if your server is hosting several domains)         your-username                      other-local-user
  • Then process it with
makemap hash /etc/mail/virtusertable.db < /etc/mail/virtusertable

Start the server

/etc/rc.d/sendmail start