UNIX for Dummies Questions & Answers

I have just started using Alpine, and have a couple of config questions for my ISP POP3 account. Under "User Domain" I have put my "ISP.ca". However when I send out email, instead of showing my email address, it shows my "OSXUserAccount_name[at]ISP.ca". No where in my settings do I see my User Account listed. Do I need to change anything to have my email account show correctly?

As well, I have a few different (dummy) email accounts that forward to my main account. Is there a way to set up an alias so that if I reply to a message, I can use the dummy account and have it show instead of my main account? Kind of like what Google lets you do...
Cheers!

I've got messages filtering into one of my 'mail" folders from "Inbox". when I try to filter from another incoming folder in the "incoming" collection to another folder in "mail", it doesn't give an indication that the message is filtering at all. I have 'move only if not deleted" marked on all filters.

Thanks in advance