OpenSMTPD, Dovecot and ldapd on OpenBSD 5.7

Looking to replace my old Postfix/Dovecot configuration with more native OpenBSD stuff, I finally ended with a configuration than seems suitable to me. I’ll be hosting virtual users and mail aliases in ldapd(8), smtpd(8) will deal with email receiving/sending and dovecot(1) will be in charge of email delivery using LMTP and email reading using IMAP. Of course, spamd(8) will do a bit of work in front of OpenSMTPD. All of those will run on OpenBSD 5.7.
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OpenSMTPD and Dovecot on OpenBSD 5.7

Those are my notes about configuring OpenSMTPD 5.4.4 and Dovecot 2.2.15 on OpenBSD 5.7. I’ve setup virtual domains and users. In this simple configuration, the virtual users are matched with local users for mail delivery. SMTP submission is authenticated and passwords for all mail services are stored in usual system files. Of course, mail reception is protected by spamd. Here are the directions.
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Back to the sea ; the mail server (SMTP, IMAP, GreyList, RBL…), episode X

Like I did with NetBSD, this is how to build an almost complete Mail Server with OpenBSD.

We’re gonna use a Dovecot IMAP server and a Postfix SMTP server. Postfix will use Dovecot as a SASL service. Both will use LDAP to identify valid users and e-mail aliases. Mail sanitization will be provided by RBL, from Postfix, and by the spamd shipped with OpenBSD.

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