Thank you for taking the time to report this bug and helping to make Ubuntu better.
Precise ships an updated version of mail-notification, so your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running apport-collect 911260 and any other logs that are relevant for this particular issue.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
Precise ships an updated version of mail-notification, so your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running apport-collect 911260 and any other logs that are relevant for this particular issue.