Howdy I've worked through the self help guides up to this point on eliminating performance issues in thunderbird. With google corp e-mail (imap) and many folders/messages, thunderbird literally locks up and spins to high CPU for up to a minute. This even happens when in the middle of composing an e-mail message, which is very disruptive to using thunderbird as a mail client. I went through what was proposed to do with gmail based services, here: http://www.ghacks.net/2013/09/07/fix-gmail-imap-slows-thunderbird-mails-arriving-timely-fashion/ I've also rebuilt the global DB now a few times, but this has not helped. Are there additional things that can be done? It would be nice if mail message editing was not delayed like this while thunderbird processes new inbound mail in the background (it would make end user not aware of whatever it is thunderbird is spinning over in the background w. IMAP) Thanks Todd