I keep getting one email returned to me as undeliverable. Message reads:
Remote Server returned '550-Verification failed for <EMAIL ADDRESS> 550-No Such User Here 550 Sender verify failed'
The only difference to this email is that it has a dash in their email address. I have tried contacting their web address and two other addresses all with the same result.
I am a lay person (not IT) but is there some way I can fix this problem?
Thanks
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