Fax server not receiving SMTP from Lotus Notes

Hello EE,

We have Lotus Domino 8.5.36.1463  and when sending to the fax server, which used to work is getting
SMTPClient: Connection broken after a network read timeout
SMTPClient: Connection broken after an error sending DATA command

We can send faxes from our printers to the fax server and know that stuff is getting to the fax server and out just fine.
Anything sent from Lotus is not getting to the Fax Server.
operationsITAsked:
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Sjef BosmanGroupware ConsultantCommented:
Router? Firewall? Anti-virus?

See also http://www.ns-tech.com/blog/geldred.nsf/plinks/geld-7c353h on virtually exactly the same subject.
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ThomasMcA2Commented:
Those errors sound like a networking problem. Have you contacted your networking team/department?

Is there a firewall between the two servers? If so, has it been changed recently?

Can you ping the fax server from the Domino server?
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operationsITAuthor Commented:
No router between only the switch.
We can ping the fax server from the Lotus server
<1ms
=15ms
=31ms
=15ms
<1ms

It used to work but nothing has changed that I'm aware of.  I can also telnet to port 25 of the fax server from lotus server
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Sjef BosmanGroupware ConsultantCommented:
No anti-virus installed, neither on the Domino server nor on the fax server?
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ThomasMcA2Commented:
Enable SMTP debugging with these console commands:
Set config Console_Log_Enabled=1
set config SmtpClientDebug=1
tell router update config

Open in new window

Try to send another message, then check the Domino log for debug messages.
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operationsITAuthor Commented:
I'll give it a shot thanks
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