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Mail is being sent but none is being received

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I've just switched to a new ISP and configured my ASG220 by adding a new interface on eth2. That way I could keep all my other settings - just in case!

Everything seems to be working normally, except that I'm not receiving any new mail, although sending is fine.

I amended our DNS records last night and checked that the MX records have been updated and they appear to have. DNS does resolve correctly.

I'm using the SMTP proxy so there shouldn't be any packet filters or NAT to configure should there?

I've tried telneting to the SMTP port on my ASG, using the new IP address but get "Could not open connection to the host, on port 25: Connect failed." It does ping.

Any ideas what I'm not doing correctly please?

Thanks in anticipation :)

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