Unless you're a sysadmin you don't generally have to worry that much about getting email delivered, you just hookup your GUI email client to your external email account and you're done. But what if ...

Working on a customer's system where a website needs to send out a really large volume of email, to the tune of a million messages per day (not spam, this is new CVs being sent out to people who ...

Subject does most of the work here, but I'll expand. [edit] Maybe if I had just RTFM'd harder I would've found my answers... I think this will help, but leaving the post up in case anybody else has ...