i'm using you great class to send a lot of emails (over 30.000).
I'm using a While loop and i automaticaly refresh the page on each 500 sent emails to avoid server-side timeout.
I'm sending the emais with no problem at all and the delivery is working just great. (SMTP, Windows Server)
The thing is that, sometimes I get this error:
501 5.1.3 Invalid address
after calling the Send() funtion.
Some of the emails i get the error from are actually invalid but, some are not. It looks like the error freezes and then returns on all emails i'm sending. Even the valid ones.
Shall i restart the sending whenever an error is found?