"Lock Type" for sendmail

Julian Field MailScanner at ecs.soton.ac.uk
Fri Jun 9 08:35:40 IST 2006

Please note that I made a slight mistake and the behaviour of the  
"Lock Type" setting does not match the comments above it in  

For sendmail, instead of defaulting to "posix" as documented, it  
defaults to "flock".

If you are using sendmail version 8.13 or greater, particularly if  
you are on Linux, then you will need to manually set this to
	Lock Type = posix
and then restart MailScanner.

Failure to set this correctly could result in delivery of more than 1  
copy of each message in the queue.

This error is corrected in the latest beta release.
Julian Field
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