Download: http://www.courier-mta.org/download.php 

There've been a couple of reports in the past stating that IMAP_USELOCKS was 
required to keep some clients from misbehaving. 

This build reimplements this option with dotlock files, replacing the 
previous implementation that used a lock file.  This implementation should 
work with NFS and AFS. 

Additionally, the new implementation will take advantage of FAM's services 
(the File Alteration Monitor) if it's available on the build platform.  If 
FAM is present, it will be used to wait for the dotlock to be released, 
instead of polling. 

I'll wait to see the reports from the field, where the IMAP_USELOCKS option 
is enabled; with or without FAM.  If everything works correctly, it should 
be possible to use FAM to implement real-time updates in the IDLE extension 
on platforms that use FAM (Irix and all current Linux distributions, 
according to FAM's web site FreeBSD and Solaris apparently works somewhat 
also), so that when the same folder is concurrently opened by multiple 
clients, folder updates from one client are immediately reflected in the 
other clients. 

-- 
Sam 



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