Why outgoing internet email stuck in SMTP server

I have 2 SMTP servers which set to be able to route email to internet with connection doc. source to all host which is R4 setting. But 1 SMTP can route email smoothly to internet , but the other one cannot. That means, this outgoing email stuck in this SMTP server and after 1 day, system return delivery failure to sender. But when I set “route *” on console, it sent out correctly. Could you guy help indicate what’s wrong with this SMTP server ? Thank you.

The error message : Router: Failed to connect to SMTP host MAILRELAY because : The server is not responding. The server may be down or you may be experiencing network problems. Contact your system administrator if this problem persists.

Subject: Why outgoing internet email stuck in SMTP server

Do you an (invalid) relay host configured in the configuration for this server?

Why are you using the Notes R4 way btw? You apparently use Domino 6.5.5. It’s far better to use a relay host or let the Domino server function as an outgoing mailserver than to hassle with connection and smtp documents.

Subject: RE: Why outgoing internet email stuck in SMTP server

Thank you Martijn, This is a historic bundle and will be kept currently. If the statement is right, how should you/IBM explain the setting works well on R4 environment ??

Because the connection doc. setting, the relay host (destination) will be referred to the setting: “source to all host”

instead of configuration doc → “Relay host for messages leaving the local internet domain”.

Another difference setting between theses 2 SMTPs is the routing cost. one is set to 1 and the other is set to 2. Is this the root cause ?? I don’t know.

Subject: RE: Why outgoing internet email stuck in SMTP server

It’s a while since I worked with R4 style relaying, but doesn’t anything in the relay host field in a configuration document (if it exists) take preference over R4 style smtp & connection docs?

The routing cost difference should only mean that the smtp server with cost 1 takes preference under normal load.

R4 style settings of course work. Backwards compatibility is one of Domino’s strongest points. However, I feel (my opinion) that it’s needlessly complicated compared to the R5+ way of routing.