4th February 2011, 14:48
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Super Moderator
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Join Date: Apr 2005
Location: Lüneburg, Germany
Posts: 41,665
Thanks: 1,896
Thanked 2,594 Times in 2,445 Posts
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First, make sure you authenticate with full email addresses, not just with the local part (the part in front of @). Also, please make sure that the local part does not exist as a system user in /etc/passwd or in /etc/aliases.
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