Upgrade to OpenSMTPD 6.4.0

It’s no secret that configuration for OpenSMTPD changed a lot with version 6.4.0. Despite the fact that changes were announced long time ago and that many configuration examples have popped-up, my particular usage wasn’t covered(1). Namely: using OpenSMTPD with Dovecot and Rspamd as chained MTA.

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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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Quick look at OpenSMTPD on OpenBSD 5.1

I want to have a look at a replacement for my Postfix/Dovecot/OpenLDAP mail server using the OpenSMTPd implementation. Not that it doesn’t work ; in fact I don’t get that much mail and everything works like a charm. I just want to see if I can use as much all-inclusive OpenBSD 5.1 daemons.

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My SMTP cheat sheet

Today is the day when my SMTP server didn’t want me to relay mail after authentication…
This is probably my fault as I may have change something without remembering it. Anyway, here the commands to use to talk SMTP to your favorite server.
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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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