A company has provided me with a list of their potential clients which they are companies as well (B2B).
Most of the emails of these prospects are like:
The problem is when I use email validation tools, it say that most of these emails are exist but can't be verified.
Some tools give me message like thise:
"These email exist and able to receive messages but due to a domain-wide setting, it is not possible to determine a true validity of such email, so we mark them as Unverifiable. Such emails are also known as "catch-all'" or "accept-all" emails. "
Can anyone explain this issue?
Any suggestions on how to solve this?