I upgraded to 5.4.25 from 5.5.1 and today I have had reports of
intermittent POP3 collection. Users will get prompted for their username
and password and the next minute the request goes through ok. There are
around a max peak of 28 to 30 concurrent collections out of a possible
90 so thats not the issue.


I did notice out of memory error messages in the message log so I
increased tcpservers limit for pop3d from 6MB to 9MB and the out of
memory errors have gone yet the issue still exists.


Ive had a look through the POP3 log and mailog but cannot see any


Vpopmail is compiled with MySQL support where the users are held in a


Is there any other logs I can check for potential problems?


Prior to this 5.5.1 had been running for 2 to 3 years with no problems
of POP3 collection from customers.


I cant really roll back because there was an issue with vchkpw in 5.5.1


Any ideas gratefully received before the rest of my hair falls out. L


Many thanks



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