Hi,
i wanted to send to a domain, but the recipient never got this mail. After a look in the logfile i saw this :
421 4.7.1 not authorized !
I wondered, because i have no ip filter set.
Then i added the ip address of the reveiver domain to the smtp outbound whitelist and the mail was sent to the recipient without any error.
Where could i find the blocked sending address ?
I searched all of the smtp options, but nothing found.
outbound whitelist
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