Over at orangehat, the poster is dumping Thunderbird 
for Mail.app. He is throwing off his loyalty to Mozilla, and looking forward to the greater integration Mail offers. Thunderbird he says is “just slightly clunkersville”.
Mike Radomski is surprised to discover that “Mail.app rocks”.
A long-time Lotus Notes user, he recently switched to Mail.app. He was able to connect to his office’s Domino system easily and he is liking what he sees after the switch:
I was delightfully astonished on how more usable my e-mail client became. I can read, sort and search my mail faster and more accurately. I can also switch between accounts with ease.
Mail Act-on and MailTags are supercharging his pleasure.
When I made the switch from Windows, I too dumped Thunderbird in favor of Mail. I really like the clean interface and am overjoyed with things like MailActOn, MailTags and Event Maker.
Recently, I’ve had to branch out and add Entourage into the mix, as there’s apparently no way I can get Mail to talk to my employer’s Exchange server. I understand it can be done, but be damned if I can make it happen.
If I could, I’d use just one tool.