31 October, 2025 by op@openbsd.org | openbsd

OpenSMTPD is a FREE implementation of the SMTP protocol with some common
extensions. It allows ordinary machines to exchange e-mails with systems
speaking the SMTP protocol. It implements a fairly large part of RFC5321
and can already cover a large range of use-cases.

It runs on OpenBSD, NetBSD, FreeBSD, DragonFlyBSD, Linux and macOS.

The archives are now available from the main site at www.OpenSMTPD.org

We would like to thank the OpenSMTPD community for their help in testing
the snapshots, reporting bugs, contributing code and packaging for other
systems.


Dependencies note:
==================

This release builds with LibreSSL, or OpenSSL >= 1.1.

It's preferable to depend on LibreSSL as OpenSMTPD is written and tested
with that dependency. OpenSSL library is considered as a best effort
target TLS library and provided as a commodity, LibreSSL has become our
target TLS library.


Changes in this release:
========================

- Don't reject single character AUTH PLAIN passwords.
- Fix address family typo (PF_INET->PF_INET6).
- Various documentation improvements.
- Removed support for world-writable mail spools.
- Updated contrib mail.local and lockspool.
- Don't die if garbage is being sent on the local socket.

This release includes the OpenBSD errata 005 which fixes CVE-2025-62875.


Checksums:
==========

SHA256 (opensmtpd-7.8.0p0.tar.gz)   4034de2e92c61fa83eedadb1d8d8bdfe65e57eb50ce9679e0140950e34ca4ab7


Verify:
=======

Starting with version 5.7.1, releases are signed with signify(1).

You can obtain the public key from our website, check with our community
that it has not been altered on its way to your machine.

$ wget https://www.opensmtpd.org/archives/opensmtpd-20181026.pub

Once you are confident the key is correct, you can verify the release as
described below:

1. download both release tarball and matching signature file to same directory:

$ wget https://www.opensmtpd.org/archives/opensmtpd-7.8.0p0.sum.sig
$ wget https://www.opensmtpd.org/archives/opensmtpd-7.8.0p0.tar.gz


2. use `signify` to verify that signature file is properly signed and that the
checksum matches the release tarball you downloaded:

$ signify -C -e -p opensmtpd-20181026.pub -x opensmtpd-7.8.0p0.sum.sig
Signature Verified
opensmtpd-7.8.0p0.tar.gz: OK


If you don't get an OK message, then something is not right and you should not
install without first understanding why it failed.


Support:
========

You are encouraged to register to our general purpose mailing-list:
http://www.opensmtpd.org/list.html

The "Official" IRC channel for the project is at:
#opensmtpd @ irc.libera.chat


Support us:
===========

The project is maintained by volunteers, you can support us by:

- donating time to help test development branch during development cycle
- donating money to either one of the OpenBSD or OpenSMTPD project
- sponsoring developers through direct donations or patreon
- sponsoring developers through contracts to write features

Get in touch with us by e-mail or on IRC for more informations.


Reporting Bugs:
===============

Please read http://www.opensmtpd.org/report.html
Security bugs should be reported directly to security@opensmtpd.org
Other bugs may be reported to bugs@opensmtpd.org