65.20.50.207 - SMTP Connection Error: dial tcp :0->10.0.44.50:2525: bind: address already in use

[jshovelt]

Hi all,

Over the past 24 hours our clients are seeing this error message when sending to BT addresses through our web application. 

65.20.50.207 - SMTP Connection Error: dial tcp :0->10.0.44.50:2525: bind: address already in use

Does anyone know what it means?

We use a third-party mail host (based in India) and we've had so many problems sending to BT over the past year that the BT Postmaster has kindly whitelisted our sending IP address. So I'm really stumped by this one!

Any help would be much appreciated, thank you.

[Crimliar]

I'm very much prepared to be wrong on this!

10.x.x.x is not a public IP range, so it can be routed to from outside the private network hosting the server.  Which would mean that your clients can't access the server using your web application.  If I'm right on this, then there is an error in the code that creates the server address in the web app!