Cannot receive mails from gitlab@civicrm.org - Sender verification failed
The mail server from our service provider is rejecting every mail from gitlab@civicrm.org. The reason I'm told is that the sender verification is failing. It appears that the email address used to send the mail is not valid.
The last time I was able to actually receive mails from gitlab@civicrm.org has been on November 7th, 2019.
Since this address is also used as the return path, it should be able to receive mails.
For testing purposes I also sent a mail directly and got this bounce message:
gitlab@civicrm.org
smtp.electricembers.net #<smtp.electricembers.net #5.7.1 SMTP; 554 5.7.1 <gitlab@civicrm.org>: Recipient address rejected: Access denied> #SMTP#