Sending 1.5 million emails safely
With that said I am thinking about the best strategy to "physically" ship out these emails. I am thinking in technical terms;
1. is it best to find a provider which I can send emails directly to the remote host (port 25 open)?
2. should I send all at once or divide over a period?
3. should I change my IP from time to time?
4. should I edit TXT records to make sender check more clear?
5. should I use a good temporary domain to send from (but different reply to) to prevent destroying my primary domain?
Any ideas or other feedback on this?
20+ Years Exp . . . . . . . . . . . . Email - CPA - PPL