I recently installed a new hard drive; thus, I had to restore my system using a backup via Time Machine.. for whatever reason, upon opening mail the first time - I had to re-enter my credentials as if it were the first time I had ever opened Mail.app. That was several days ago and I have been receiving mail on my MBP just fine; however, I just went to send my first email from my MBP this morning and I was asked to enter my password b/c of a "SMTP server error".. I entered my MBP password, my email account password, etc. and NOTHING works...seemingly, until this is resolved - I will not be able to send mail, which will be an issue.. Does anybody have any advice as to what I should do? Thanks in advance!