outlook 2013 error

when i send an email to multiple people the program will close without sending the email.
i have updated outlook 2013, ran a scanpst on the file. this does not happen with only one email address.
mdsmith52Asked:
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awawadaCommented:
Will it happen if you start Outlook in safe mode? ( outlook.exe /safe )

Source:
http://support.microsoft.com/kb/2632425/en-us
ktaczalaCommented:
What type of connection? exchange? POP?  IMAP(gmail)?
mdsmith52Author Commented:
pop server - wonder about imap fixing problem
Md. MojahidExchange server admin Commented:
Reset your AutoComplete cache by renaming your nk2-file to .ol when Outlook is closed.
See: Remove addresses from AutoSuggest/Auto-Complete

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