Comment 0 for bug 1089342

By default IPv6 privacy extensions is installed on Ubuntu server and temporary addresses are preferred.

This means that outgoing connections from Postfix will use the temporary IPv6 addresses, which will likely fail reverse DNS checks and cause mail to bounce.

Postfix should implement the requirements of RFC5014 and ensure that it sets the IPV6_PREFER_SRC_PUBLIC IPv6 socket option (or possibly provide a configuration option to enforce that requirement).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: postfix (not installed)
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
Uname: Linux 3.2.0-34-generic x86_64
ApportVersion: 2.0.1-0ubuntu15
Architecture: amd64
CheckboxSubmission: 55cafa5b8b82ed224cc59d444cb1fc25
CheckboxSystem: 3e53d3ea5811723345f19eff5070f9ab
Date: Wed Dec 12 11:51:28 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
SourcePackage: postfix
UpgradeStatus: Upgraded to precise on 2012-05-07 (218 days ago)