I have a user that wants to email 300 ish people once a month, these are double opt in, however I wanted to check the addresses are valid before they get sent, in the hope that we won't get blacklisted on that IP.
The question is, are there any web based bulk email verifying programs available that I could host.. I checked sourceforge/freecode but cannot see anything.
I can see Windows based apps that I could use at a push..
Anyone got any ideas or comments on the risks of this ?
Thanks