21 December 2016

SMTP Relay Not Sending Mail

We have a SMTP Relay configured on a client's server to relay mail from on-prem to their Office 365 tenant.  This allows Scan to Email functionality from printers etc.

Recently a client told me that they're trying to scan to email but it's failing for them.  I created a test email.txt file which was to just send a simple email.  I put this file in the 'Pickup' folder, and it just stayed there.  Usually it's picked up immediately and relayed.

I checked the services and noticed that the Simple Mail Transfer Protocol (SMTP) service was stopped, and for some reason it was set to 'Manual'.  A quick manual start and then changing this to 'Automatic' resolved the issue for me.

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