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i having exact this Problems here: Unable to send mail: ERROR 550 - Verification failed for [email protected] invalid sender
(suddenly since a week or two.) Before it was working fine. This came with an Update?
Can some one show how to fix this? This is quite bad for us, customers are Reporting Problems (while using Smart Hosts)
The System:
Debian 8.11 Plesk Onyx
Version 17.8.11 Update #40
i having exact this Problems here: Unable to send mail: ERROR 550 - Verification failed for [email protected] invalid sender
(suddenly since a week or two.) Before it was working fine. This came with an Update?
Can some one show how to fix this? This is quite bad for us, customers are Reporting Problems (while using Smart Hosts)
The System:
Debian 8.11 Plesk Onyx
Version 17.8.11 Update #40
