Helo, A reliability issue has been reported yesterday that allows a remote MTA to crash OpenSMTPD by causing it to hit one of its sanity check and exit with fatal(). Highly annoying but not dangerous.
On OpenBSD, the issue is fixed in -current and the fix is backported for OpenBSD 6.4 and OpenBSD 6.5: - on current, update your tree and rebuild smtpd or install snapshot - on 6.4 or 6.5, running `syspatch` will properly update your smtpd On other systems, I have just published a new release 6.4.2p1 which only consists of the previous 6.4.1p1 release but with errata diff applied. I have updated our website front page to provide the tarball and signature as direct links. Alternatively, you can grab the release from our github mirror under the tag opensmtpd-6.4.2p1: https://github.com/OpenSMTPD/OpenSMTPD/tree/opensmtpd-6.4.2p1 -- Gilles Chehade @poolpOrg https://www.poolp.org patreon: https://www.patreon.com/gilles