below error message:
diagnostic information administrators:
generating server: keys.mainone.net
remote server returned #5.0.0 smtp; 550-please turn on smtp authentication in mail client, or login 550-imap/pop3 server before sending message. (keys.mainone.net) 550-[41.75.80.120]:39162 not permitted relay through server without 550 authentication.>'
hi tolulopeus,
it seems mx , spf records incorrect office 365 business essential subscription. please let administrator check referring following article:
https://support.office.com/en-ie/article/create-dns-records-at-any-dns-hosting-provider-for-office-365-7b7b075d-79f9-4e37-8a9e-fb60c1d95166?ui=en-us&rs=en-ie&ad=ie
meanwhile, please provide office 365 email address via private message can check side.
thanks,
gary
Office / Outlook / Windows 10 / Office 365 for business
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