More about bulk email checker
Email verification is very cool feature that linked with email marketing, it helping to find real customers. You can try in on source.
Callouts or callbacks (aka Sender Address Verification - SAV) are a structure of backscatter. They are in use accustomed to via receiving systems to essay to warrant that a slight drug mailbox exists, close attempting performance to that mailbox and viewing the response. If ineptly implemented then they can cause a recantation of service on a modus operandi that had its realm forged into the spam. They use a RCPT TO command to study execution, attempting to replicate what the (over lame) VRFY instruct allowed.
Callouts or callbacks (aka Sender Address Verification - SAV) are a structure of backscatter. They are in use accustomed to via receiving systems to essay to warrant that a slight drug mailbox exists, close attempting performance to that mailbox and viewing the response. If ineptly implemented then they can cause a recantation of service on a modus operandi that had its realm forged into the spam. They use a RCPT TO command to study execution, attempting to replicate what the (over lame) VRFY instruct allowed.