Configuring mail server on OpenBSD 6.5.

This guide is mostly notes for myself rather than something readable, but it may be useful anyway. It contains an example of working configuration for OpenSMTPD, SpamPD, SpamAssassin, DKIM Proxy and Dovecot with Sieve support on OpenBSD...

https://ch1p.io/blog/11/

#mail #opensmtpd

OpenBSD Mail Smarthost Runbook. #opensmtpd #mail

OpenBSD and mail server setup.

Cool articles from Gilles Chehade about mail server setup.

https://poolp.org/posts/2019-08-30/you-should-not-run-your-mail-server-because-mail-is-hard/

https://poolp.org/posts/2019-09-14/setting-up-a-mail-server-with-opensmtpd-dovecot-and-rspamd/

#mail #opensmtpd #rspamd

OpenBSD mailing lists with OpenSMTPD.

This post is about how to make maling lists in OpenBSD (whose current version is 6.5). With OpenSMTPD (and Dovecot, optionally), this method is perhaps the simplest...

https://dev.to/nabbisen/openbsd-mailing-lists-with-opensmtpd-163j

#opensmtpd

LPE and RCE in OpenSMTPD (CVE-2020-7247).

We discovered a vulnerability in OpenSMTPD, OpenBSD's mail server. This vulnerability is exploitable since May 2018 (commit a8e222352f, "switch smtpd to new grammar") and allows an attacker to execute arbitrary shell commands, as root.

https://www.openwall.com/lists/oss-security/2020/01/28/3

#opensmtpd #mail

LPE and RCE in OpenSMTPD's default install (CVE-2020-8794).

https://www.openwall.com/lists/oss-security/2020/02/24/5

#opensmtpd #security

Remote root exploits are now publicly available for LPE and RCE in OpenBSD's OpenSMTPD's default install (CVE-2020-8794).

https://www.openwall.com/lists/oss-security/2020/02/26/1

#security #opensmtpd

Fullstack mailserver based on OpenSMTPD for OpenBSD using ansible

https://github.com/AnsiMail/AnsiMail

#ansible #opensmtpd

An OpenBSD E-Mail Server Using OpenSMTPD, Dovecot, Rspamd, and RainLoop.

This tutorial demonstrates a full-featured email server running on OpenBSD using OpenSMTPD, Dovecot, Rspamd, and RainLoop. OpenSMTPD is the default mail server for OpenBSD. Choose a Vultr Compute Cloud instance with plenty of storage for the expected number of users.

https://www.vultr.com/docs/an-openbsd-e-mail-server-using-opensmtpd-dovecot-rspamd-and-rainloop

#opensmtpd #mail

Setting up an email server in 2020 with OpenSMTPD and Dovecot

Another one link... https://prefet.ch/blog/2020/email-server/

#mail #opensmtpd #dovecot

Missing Cron Email When Restarting smtpd

I have a cron job that renews an SSL certificate from Let's Encrypt, and then restarts the smtpd daemon so that the new certificate is picked up. This all works fine--as proven by both the presence of a new, valid cert on disk, and smtpd successfully restarting--but cron never sends an email with the output of the job. What gives?

https://www.packetmischief.ca/2021/02/03/missing-cron-email-when-restarting-smtpd/

#cron #mail #opensmtpd

OpenSMTPD on the Local Network.

One of the many great things about OpenBSD is that it comes with OpenSMTPD by default, allowing my servers to communicate with themselves and each other via the SMTP protocol. This is used to send insecurity reports, failed cron jobs, et cetera to various users on the system. However, I don’t want to have to check each machine’s mail spool to see if there are any messages I need to act upon. I’d much rather have a central mail server to collect all these messages so that I have a single place to check...

https://josephchoe.com/2021/12/24/opensmtpd

#opensmtpd #mail

Mail Server Hosting on OpenBSD.

Mail server is an everyday requirement for everyone. Why trust and rely on 3rd party mail servers? There are many reasons to host your mail server today, in just one sitting! The following section mentions the significant benefits of hosting a mail server...

https://serhanekici.com/005-mailserver-openbsd.html

#opensmtpd #mail

Excision Mail.

Fullstack, security focused mailserver based on OpenSMTPD for OpenBSD.

https://excision.bsd.ac/

#opensmtpd #mail