I have two email accounts that do not allow me to send from my iPhone as they cannot connect to the outgoing mail servers I have specified. I remember when I was a Blackberry user with Verizon having to obtain a login and utilize Verizon's outgoing mail servers. Is this the case with AT&T as well? Usually its because ISP's firewalls block access to certain things as they'd prefer you to use theirs. Thanks for your advice!