*Update*

Mail now appears to be delivering at full capacity. No mail was lost.

IT Services will continue to monitor email through post to ensure no further disturbances occur. Please notify the Support Centre if you notice any further problems.

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Previous Description (2013-04-11 15:34:21):

IT Services has noticed problems while trying to deliver mail for post.queensu.ca email accounts. The cause an impact are still under investigation.

Main @queensu.ca email addresses are not affected.