Mail 4.1 and difficulty retrieving new messages

Question

I have noticed that after upgrading to S.L., Mail sometimes takes a VERY long time to retrieve new messages from my IMAP servers. Sometimes, Mail will even tell me that my IMAP servers are offline or down, when I know they are not because I can retrieve mail using other clients / webmail / Leopard 10.5 Mail. It is getting really frustrating that sometimes I have to open and close Mail 4.1 multiple times in order to get it to sync properly with the servers. Anyone else?

Answer 1

I am having the same problem. I turned on IMAP logging and can see constant FETCHing to the server. It drains laptop battery, uses around 30% CPU all the time, and fails to stop - eg never get new messages.
READ Sep 23 12:32:57.907 [kCFStreamSocketSecurityLevelNone] -- host:mail.anyware.co.uk -- port:143 -- socket:0x116e37f30 -- thread:0x119091fb0
D 483344)
* 2967 FETCH (FLAGS (\Answered \Seen $NotJunk JunkRecorded NotJunk) UID 483470)
* 2968 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 483795)
* 2969 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 484112)
* 2970 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 484284)
* 2971 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 484390)
* 2972 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 484508)
* 2973 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 484619)
* 2974 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 485304)
* 2975 FETCH (FLAGS (\Answered \Seen $NotJunk JunkRecorded NotJunk) UID 485973)
* 2976 FETCH (FLAGS (\Answered \Seen $NotJunk JunkRecorded NotJunk) UID 486418)
* 2977 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 486621)
* 2978 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 486981)
* 2979 FETCH (FLAGS (\Seen) UID 487222)
* 2980 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 487294)
* 2981 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 487525)
* 2982 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 487732)
* 2983 FETCH (FLAGS (\Answered \Seen $NotJunk JunkRecorded NotJunk) UID 487787)
* 2984 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 488031)
* 2985 FETCH (FLAGS (\Answered \Seen $NotJunk JunkRecorded NotJunk) UID 488136)
* 2986 FETCH (FLAGS (\Flagged \Seen $NotJunk NotJunk) UID 488165)
* 2987 FETCH (FLAGS (\Seen $NotJunk NotJunk) UID 488380)
* 2988 FETCH (FLAGS (\Answered \Flagged \Seen $NotJunk JunkRecorded NotJunk) UID 488437)
* 2989 FETCH (FLAGS (\
READ Sep 23 12:32:57.909 [kCFStreamSocketSecurityLevelNone] -- host:mail.anyware.co.uk -- port:143 -- socket:0x116e37f30 -- thread:0x119091fb0
Seen $NotJunk NotJunk) UID 488510)
It just goes on forever. Mail always show the account as busy with a spinner.
It is making Mail useless for me. This is after it "lost" all the passwords for my mail accounts after installing 10.6.1
The IMAP server is definitely fine. iPhone gets the mail from same server fine.
I've done a "rebuild" on the mailbox. I've told it to "synchronize". No joy.