April 26, 20188 yr Hi, I had the same error in the discussion that I linked, but in that discussion I did not read the probable solution, could you tell me how to solve this problem? Thanks
April 26, 20188 yr Check your settings for the "sender address" and your admin's e-mail address, they need to be VALID e-mail addresses. Otherwise, please provide mailserver logs (/var/log/mail*)
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