Instantly, as said here. Their data scraper is good, and expensive. Try them out.Is there a platform I can send mass email? Looking to test some free platform
I am trying to send to 150 to 300 emails first to see the result
The best way would be going through AWS SES, but you’ll need to have aged/warmed SMTPs to make sure you’re hitting a good amount of inbox - otherwise you’ll end up sending out straight into spam.