Package: opensmtpd Version: 7.6.0p1-1 Severity: important Tags: ipv6 upstream
Dear Maintainer, A typo in upstream source code (PF_INET6 expected but PF_INET written) causes IPv6 address parsing failure in OpenSMTPD Portable 7.6.0p0. When /etc/smtpd.conf is configured with a src table with an IPv6 address, OpenSMTPD will fail to parse that source address, generate a TempFail saying "No valid route to destination", which causes delivery failure to IPv6-only MX and increase latency to dual-stack MX due to the requeuing and retries. See https://github.com/OpenSMTPD/OpenSMTPD/pull/1275 for details. Steps to reproduce: 1. Set up an IPv6-only MX for receiving emails. 2. Configure an OpenSMTPD relay action with a src table where an IPv6 addressess is specified on another host, e.g., table addrs { "[2001:db8::1]", "203.0.113.1" } action outbound relay src <addrs> 3. Send an email to the IPv6-only MX from the OpenSMTPD MTA. 4. Check OpenSMTPD's log with journalctl. You will find some errors like this: Dec 10 09:00:00 mailer smtpd[12345]: warn: Failed to get source address for [relay:example.com,smtp,sourcetable=addrs] Dec 10 09:00:00 mailer smtpd[12345]: 0000000000000000 mta delivery evpid=aa12926d7ede2a40 from=<[email protected]> to=<[email protected]> rcpt=<-> source="-" relay="example.com" delay=0s result="TempFail" stat="No valid route to destination" This bug has been fixed in upstream v7.8.0, but no minor upstream version with the fix is released. Thus, I suggest we backport this fix as a Debian patch to 7.6.0 so that the current stable Debian trixie could benefit from it. -- System Information: Debian Release: 13.2 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 6.12.57+deb13-amd64 (SMP w/1 CPU thread; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages opensmtpd depends on: ii adduser 3.152 ii debconf [debconf-2.0] 1.5.91 ii ed 1.21.1-1 ii init-system-helpers 1.69~deb13u1 ii libc6 2.41-12 ii libcrypt1 1:4.4.38-1 ii libdb5.3t64 5.3.28+dfsg2-9 ii libevent-2.1-7t64 2.1.12-stable-10+b1 ii libpam0g 1.7.0-5 ii libssl3t64 3.5.4-1~deb13u1 ii zlib1g 1:1.3.dfsg+really1.3.1-1+b1 opensmtpd recommends no packages. Versions of packages opensmtpd suggests: ii ca-certificates 20250419 ii opensmtpd-filter-dkimsign 0.5-2.1 ii opensmtpd-filter-rspamd 0.1.8-1+b10 pn opensmtpd-filter-senderscore <none> pn opensmtpd-table-ldap <none> pn opensmtpd-table-mysql <none> pn opensmtpd-table-passwd <none> pn opensmtpd-table-postgres <none> pn opensmtpd-table-redis <none> pn opensmtpd-table-socketmap <none> pn opensmtpd-table-sqlite <none> -- Configuration Files: /etc/smtpd.conf changed [not included] -- debconf information excluded
