Would suspect its a header type being blocked by the Firewall, -- Would be easier if you try and send a few from a specific IP at an agreed time / date and look at logs for that period from that IP.
The add the blocked content type to the Allowed header list.
Robert Appleton
Microsoft...
Do you mean you want to send email from a mail server, from another IP address other than the one you collect on?
2 Ways - You could use your own SMTP server to send via one of your ISP provided IPs, Or you could send via a 3rd party SMTP server?
Could you explain a bit more exactly what your...
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