-Mail.app- Sending mail problem??

I recently jailbreaked my touch using the jailbreakme.com method, and then installed all the iphone apps using repo.us.to

I've also properly set up my GMail account (from the Google help pages) and everything works well except sending mail (?). I can check my incoming messages just fine, save drafts and have that be reflected on the actual gmail server, but for some reason sending messages from the touch just will not work. It tells me to check the outgoing server settings, but I did, and it's properly set up for smtp.gmail.com and server 587.

Anyone else have this problem, or have an idea what I can do to fix this?

 

The thing is I'm using Gmail's new IMAP, not POP.

 

I'm currently using the IMAP feature. I'm connected on my home wireless, and I just noticed the sending mail feature wasn't working once I tried it out.

I've used the Mail app in other places though, and like I said, everything else seems to be working fine. I just want to get to the bottom of this, as it would be really helpful if I could reply to my emails in class without using a computer.

 

Nope, I don't have anything like PeerGuardian on my Mac. As for my firewall settings, I haven't really set it up, but this is how it looks:



My router doesn't seem to be blocking anything either.

 

You mean enabling IMAP inside the Gmail settings? Yup, I've done that already.

Do you think if I just uninstall the mail app, and re-install it, it would somehow fix things? Or is this clearly something wrong with my preferences or whatnot?