Another day in the life of an IT fixer.
We didn't have email coming in or going out of the building. Well, day one: now outgoing mail. Day two: no incoming or outgoing mail. Day three: fixed.
Eventually we tracked it down to the IP address for the SMTP server had changed, and we weren't using the DNS for it, for some reason.
I know what you're thinking, that only explains the outgoing mail's blockage.
Well, it's amazing what you can switch off while you're trying to fix something else. Oops!
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