[Question] weird smtp/cpanel configuration

Hi All

I've configured my smtp proxy to work with email encryption just fine (as per document http://www.astaro.org/astaro-gateway...il-server.html).

However, I have just noticed the following: I had by mistake set on my cpanel the following option: Send all unrouted email for: <one of my email addresses> (attached)

When I decided to change this to "Discard with error to sender (at SMTP time)" every email I am sending out an email from my domain I am getting an automatic reply back

<email address I am sending the email to>
SMTP error from remote mail server after RCPT TO:<email address I am sending the email to>:
host ****.gr [*******]: 550-Verification failed for <prvs=0494c85d84=*****@***.gr>
550-No such person at this address
550 Sender verify failed

prvs=0494c85d84=*****@***.gr doesn't exist as a user

Anyone seen this issue before?

Thanks

Attached Images

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