Incoming emails are stuck in SharePoint 2010 server Drop folder

First symptoms

  • Emails sent to SharePoint library address don’t reach destination.
  • No error message returns to sender

What to check to identify the issue

  • Incoming email “Drop” folder on SharePoint WFE – all missing emails should be there, awaiting to be picked up by SharePoint
  • ULS logs has the following error with “E-mail” category:

    The Incoming E-Mail service has completed a batch. The elapsed time was 00:00:00.0156241. The service processed 4 message(s) in total. Errors occurred processing 4 message(s): Message ID: Message ID: Message ID: Message ID:

Resolution

It was hard to find it because of misleading info, so I post it here.

Update: the issue was fixed in May 2015 CU. Keep reading if you cannot install this CU, need temporary workaround or you are just naturally curious.

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SharePoint 2010 Administration service fails to start

Symptoms

  • SharePoint 2010 Administration service cannot start after the server boot-up.
  • Windows event log contains the following error:

The service did not respond to the start or control request in a timely fashion. Error (7000, 7009)

  • SharePoint 2010 Administration service cannot be started manually in this case

Root cause

The issue is caused by automatic check for revoked certificates on the start of any .Net executable (SharePoint 2010 Administration service executable WSSAdmin.exe in this case). This check is performed by download an untrusted and trusted certificate trust lists (CTLs) from the Windows Update web service. If this download is not possible for some reason, service can fail to start because of the timeout. You can find some additional details in the KB2677070

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