OpenSMTPD has an issue about the problem: https://github.com/OpenSMTPD/OpenSMTPD/issues/650
- Bug#813398: opensmtpd: segfaults when relaying email Nicolas Évrard
- Bug#813398: opensmtpd: segfaults when relaying email Ryan Kavanagh
- Bug#813398: opensmtpd: segfaults when relaying email Björn Schümann