Does anyone have experience sending to a million user email list and having the newsletter delivered to everyone over the course of a single business day? There are a million users in my list. My list starts on Wed. but doesn’t finish until Saturday. I run on Amazon SES. The bottleneck is the sending speed of the MTA not the sending server itself. My apache box sends at 11K/hr which is as fast as it can send. The box is under no load at all.
I run mysql on one box and apache on a diff. box. It seems to me that phpList would handle multiple front ends reading and writing to the same mysql database but I don’t want to take a chance on sending multiple emails to the same people. Does anyone have any experience with this?