If it has it's own server it would need outbound port 25 allowed through your firewall and it would not need any other settings at all, just the address you want to send from and to. Regardless, if the IBM SMTP server is working for outside domains, why isn't it working for our own? That's not spoofing, that's just a 'from' address. Again, maybe I'm not understanding it completely: Even though the IBM has its own SMTP server, it's essentially 'spoofing' the from address - which is why the Inbound Connector needed to be setup in Office 365.
Oh! I thought you were sending from the relay with other accounts, but everything coming out of the IBM was failing.īut, if the IBM has its own server, why are you trying to use O365 in the first place?
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