Recently a user tried to send an email from 365 to 365 user ( external not internet ) and got the following bounce back Generating server: SYYP282MB0848.AUSP282.PROD.OUTLOOK.COMRemote Server […]
Tag: Bounce back
crazydomains.com.au – is not permitted to relay through this server without authentication
Recently had a customer use crazydomains for their Emails. Incoming email stopped with the error below550 Please turn on SMTP Authentication in your mail client. mail-wm1-f50.google.com [209.85.128.50]:38049 is not […]
Office 365 Failed : 550 5.4.316 Message expired, connection refused(Socket error code 10061)
Recently a few users had the following bounce backs from Office 365 to an On-Prem Mailserver with the error‘550 5.4.316 Message expired, connection refused(Socket error code 10061)Checking […]