Can't Receive E-Mail from Lotus Notes

T

transmobius

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Jan 11, 2006
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I've got a CentOS box running Exim v4.63. The exim.conf is a fairly stock SpamBlocker version.

We've been getting reports lately that messages are not getting through. After a bit of research it turns out that ALL of the complaining parties are running (various versions of) Lotus Notes. It doesn't look like any notes e-mail is making it in. The mainlog and rejectlog don't seem to even show the attempts!?

Anyone seen this before?
 
If the logs don't show the attempts it's possible that the servers are being blocked somewhere across the 'net; perhaps at their own ISPs.

Or perhaps you can see a connection attempt failing in /var/log/exim/rejectlog.

However by default we don't log all possible exim actions; to do so would create logs many times larger than the logs we're getting now.

Check the exim documentation here to learn how to add more logging to your exim logs.

Jeff
 
I don't think it's an ISP issue, the sending servers are from all over, and this has apparently been going on for weeks. For the Lotus Notes senders only. We're processing thousands of messages, but can't receive any from Notes servers.

They've reported getting this bounce message:

451 4.4.1 reply: read error

The reject log shows nothing (by name or IP). I'll look at turning the logging level up.
 
I don't think there's anything at the tcp/ip level that will differentiate the Lotus Notes server.

What port does Lotus Notes use to connect to the server?

Exim by default listens on port 25 and port 587.

Lotus Notes is probably using some other port.

Find out the port and we can get that fixed :) .

Jeff
 
Running Centos 4.4 x86_64 my self, and using Lotus Notes at work, have no problems whatsoever mailing to my DA box. Really don't think Lotus Notes is the problem.
 
These are the mailers that are being lost (had them send to another server to get their ID's):

X-Mailer: Lotus Notes Release 6.5.1 January 21, 2004
X-Mailer: Lotus Notes Release 6.5.2 June 01, 2004
X-Mailer: Lotus Notes Release 6.5.4 CCH5 September 12, 2005
X-Mailer: Lotus Notes Release 6.5.5 November 30, 2005

No other types of mail servers are being dropped. I must have introduced something that Notes can't handshake with . . .
 
It looks like TLS is the problem.

I added this in /etc/exim.conf:
tls_advertise_hosts = !*
hosts_avoid_tls = *

And a flood of messages from the Notes servers streamed in.

How can I test if my TLS is working or broken? What is the best resource to read up on this feature?
 
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