I'll second this suggestion. It would be very useful.

This can be done by adding additional conditions to a filter now but it is a major pain.

What I'd like to see is the account option added ahead of the filter conditions so you could set the filter to run on all accounts, just one account or best your selection of accounts. I have filters that look for specific things that only appear on one account and there is no reason they should be run on mail from other accounts.

Stan's got a really good point. It would be super useful to be able to specify which accounts a filter checked (one, two, this one but not that one, these accounts only AND in this specific order, etc. etc.).

Thanks Stan & QuietOne - I also agree, I prefer Stan's suggestion of an additional option separate from the filter conditions to select the account(s) the filter should apply to.

I think it's important to note that the account(s) to which a filter applies not be based on anything selected from the msg header, rather it's application be based MWP's knowledge of what account is being polled. I believe that's what would be required to "run a filter" selectively but I don't see it stated in black and white. ;)

You could do like Hamster does and stick in an X header line for the message that showed what account it came from:

X-Mailwasher-account: me@example.com

That wouldn't change the real message on the server, just the MW copy of it in memory.

I like this idea, especially since some names get spoof mails, like my ebay mail or PayPal or others who want to capitalize on my attention but are not legit. Makes it easier to sort.