I had just spend some minutes typing my message hers and then Safari on my iPod crashed and I lost what I had typed. Would that be a bug causing that to happen? Not that I could replicate it.
As I was saying, I am sick of Mail and the add on I use Mail-Act-on. Mail may have problems dealing with large volumes of e-mails say 50-100 per 1-2 days from various accounts. I'm certainly having problems with it.
I use message rules and because Mail doesn't allow you to combine and & or into one rule, I use the Mail-Act-On plugin. As an aside, Outloook Express offered more advanced email rules as fat back as 2000 if not before, yet Apple don't 12+ years later.
Mail-Act-on however does have bugs, such as duplicating ny emial and sending it to the wrong folder. I've been in contact with the company who make it a reasonable number of times and I think they have given up trying to locate and find the source of the problem.
When I last researched this, Entourage wasn't considered good and Thunderbird didn't offer more advanced mail rules. I believe from memory Opera did. However everything was tied to email accounts which meant if you deleted an account, all your offline emails would get deleted. Like I want that to happen.
I am considering Outlook for Mac. Might see if Thunderbird has improved at all. I don't know if Sparrow has any advanced email rules.