What is ISV (Interactive Sender Verification) ?

 

Interactive Sender Verification (ISV) is a spam-blocking mechanism.

The mechanism will send verification mail to the sender to confirm his identity.
If the sender is a real person and valid email address, he can receive this mail, read it and
input the content inside the image to confirm his email address to be a valid sender email
address for recipient.
Then his email will be added into recipient's white list and the sender
will not need to do the verify again as long as his email address is still in recipient's white list.
After verification is done, the mail will move from queue to recipient mailbox.

 


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