Use mailgun to fax to a local extension

andtaylor

New Member
Apr 20, 2026
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Hi. I have been trying to set up Mailgun to email to a FSPBX server to then pass the fax on to a local extension with a real fax machine connected to an ATA.
It's for an art project.

So far I can get the email to be delivered to the server but then it errors out for any destination. I did see another post that mentions a 9999 prefix, can anyone enlighten me as to how that works and if what I am trying to do is even possible? Thanks!