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How to track this email message?
Question asked by Merle Wait - 9/28/2026 at 11:36 AM
Answered
M
This message came into our inbound server.. and shows being sent to the main server
SMTP
[2026.09.24] 16:51:23.885 [67.227.228.139][21664732] Data transfer succeeded, writing mail to 75769285.eml (MessageID: <ab7c286efd66a363aa00797bfb28bc45@XXXXXXX.ZZZZZZ.com>)
[2026.09.24] 16:51:23.940 [67.227.228.139][21664732] cmd: QUIT
[2026.09.24] 16:51:23.940 [67.227.228.139][21664732] rsp: 221 OK
inbound.server.com --> main.mailserver.com

Soooo it was moved to the main server
On the main mail server... that message ID is no where to be found.... I did searches looking for the messageid (partial ab7c286efd66a363aa00797bfb) .. Can't find it...
Also searched by the userid that was supposed to receive it.

How else can I search...
Millennium Systems Replied
9/28/2026 at 2:52 PM
Merle,

If you have delivery logs sets to detailed you should be able to find that message there searching for the eml number, in this case 75769285
M
Merle Wait Replied
9/28/2026 at 3:56 PM
SO on the main server (not the inbound email server) .. I checked the delivery log...
I do not find 75769285   or  ab7c286efd66a363aa00797bfb)
'========================================================
Here is what is weird.....  From the MAIN.MAILSERVER.COM
I am pretty sure.. "Session=42855208      " is the session with the email that I am looking for....
**BEFORE ** anyone jumps to conclusion {that the server is not set up correctly}  please look at SESSION =53865602]where everything completed correctly.
'========================
16:52:07.207 [192.168.1.22][42855208] Connection initiated
16:52:07.207 [192.168.1.22][42855208] rsp: 220 main.mailserver.com
16:52:07.208 [192.168.1.22][42855208] connected at 9/24/2026 4:52:07 PM
16:52:07.228 [192.168.1.22][42855208] Country code: Unknown
16:52:07.228 [192.168.1.22][42855208] IP in whitelist
16:52:07.237 [192.168.1.22][42855208] cmd: EHLO inbound.server.com 
16:52:07.237 [192.168.1.22][42855208] rsp: 250-main.mailserver.com  Hello [192.168.1.22]250-SIZE 69905066250-AUTH PLAIN LOGIN CRAM-MD5250-STARTTLS250-8BITMIME250-SMTPUTF8250-DSN250 OK
16:52:07.268 [192.168.1.22][42855208] cmd: STARTTLS
16:52:07.268 [192.168.1.22][42855208] rsp: 220 Start TLS negotiation
16:52:07.387 [192.168.1.22][42855208] cmd: EHLO inbound.server.com 
16:52:07.387 [192.168.1.22][42855208] rsp: 250-mail.mainserver.com Hello [192.168.1.22]250-SIZE 69905066250-AUTH PLAIN LOGIN CRAM-MD5250-8BITMIME250-SMTPUTF8250-DSN250 OK
16:52:07.423 [192.168.1.22][42855208] cmd: MAIL FROM:<clientj@mydomain.com> BODY=8BITMIME RET=HDRS ENVID=d666d735-a5e1-4236-9188-5f27d638a2f4 SIZE=3980
16:52:07.423 [192.168.1.22][42855208] senderEmail(1):clientj@mydomain.com
16:52:07.423 [192.168.1.22][42855208] rsp: 550 Authentication is required for relay
16:52:07.423 [192.168.1.22][42855208] disconnected at 9/24/2026 4:52:07 PM
Now, immediatily the next session starts

16:52:22.302 [192.168.1.22][53865602] Connection initiated
16:52:22.302 [192.168.1.22][53865602] rsp: 220 mail.mainmail.server.com
16:52:22.303 [192.168.1.22][53865602] connected at 9/24/2026 4:52:22 PM
16:52:22.319 [192.168.1.22][53865602] Country code: Unknown
16:52:22.319 [192.168.1.22][53865602] IP in whitelist
16:52:22.333 [192.168.1.22][53865602] cmd: EHLO mx1.ebt.net
16:52:22.333 [192.168.1.22][53865602] rsp: 250--mail.mainserver.com  Hello [192.168.1.22]250-SIZE 69905066250-AUTH PLAIN LOGIN CRAM-MD5250-STARTTLS250-8BITMIME250-SMTPUTF8250-DSN250 OK
16:52:22.364 [192.168.1.22][53865602] cmd: STARTTLS
16:52:22.364 [192.168.1.22][53865602] rsp: 220 Start TLS negotiation
16:52:22.440 [192.168.1.22][53865602] cmd: EHLO inbound.server.com
16:52:22.440 [192.168.1.22][53865602] rsp: 250-mail.availx.com Hello [192.168.1.22]250-SIZE 69905066250-AUTH PLAIN LOGIN CRAM-MD5250-8BITMIME250-SMTPUTF8250-DSN250 OK
16:52:22.452 [192.168.1.22][53865602] cmd: MAIL FROM:<A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com> BODY=8BITMIME RET=HDRS ENVID=799eb734-7114-44ef-af74-dd1db033aa2b SIZE=39840
16:52:22.452 [192.168.1.22][53865602] senderEmail(1): A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com
16:52:22.452 [192.168.1.22][53865602] rsp: 250 OK <A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com> Sender ok
16:52:22.452 [192.168.1.22][53865602] Sender accepted. Weight: 0. Block threshold: 30. 
16:52:22.483 [192.168.1.22][53865602] cmd: RCPT TO:<another@client.com> NOTIFY=FAILURE
16:52:22.484 [192.168.1.22][53865602] rsp: 250 OK <another@client.com> Recipient ok
16:52:22.513 [192.168.1.22][53865602] cmd: DATA
16:52:22.514 [192.168.1.22][53865602] Performing PTR host name lookup for 192.168.1.22
16:52:22.530 [192.168.1.22][53865602] PTR host name for 192.168.1.22 resolved as UnknownHost
16:52:22.530 [192.168.1.22][53865602] rsp: 354 Start mail input; end with <CRLF>.<CRLF>
16:52:22.551 [192.168.1.22][53865602] Parsed spamchecks from gateway, Null Sender=0,passed, _DMARC=0,passed, _DKIM=-2,Pass, _ARC=none, _customrules=, declude=-47
16:52:22.551 [192.168.1.22][53865602] senderEmail(2): les@outsidedomain.com parsed using FROM: REAL Southern Gospel < les@outsidedomain.com >
16:52:22.736 [192.168.1.22][53865602] DMARC Results: passed, Reason: Unknown, Reject? False
16:52:22.736 [192.168.1.22][53865602] rsp: 250 OK
16:52:22.737 [192.168.1.22][53865602] Received message size: 39882 bytes
16:52:22.738 [192.168.1.22][53865602] Successfully wrote to the HDR file. (L:/Smail/Spools/SubSpool2/53161707.hdr)
16:52:22.738 [192.168.1.22][53865602] Data transfer succeeded, writing mail to 53161707.eml (MessageID: <1142349068351.1142121742813.2110983223.0.321751JL.2002@synd.ccsend.com>)
16:52:22.748 [192.168.1.22][53865602] cmd: QUIT
16:52:22.748 [192.168.1.22][53865602] rsp: 221 OK
16:52:22.748 [192.168.1.22][53865602] disconnected at 9/24/2026 4:52:22 PM
'================================================
soooo not sure why one would say "relay not allowed"
To clarify, the user / domain received hundreds of emails per day... and is working fine
D
Douglas Foster Replied
9/28/2026 at 7:00 PM
This type of site-specific question is best handled as a support ticket.
I have not attempted to parse your logs, because much is lost by the forum's formatting, and I assume some portions of the log have been anonymized.
That said, there is only one plausible reason for the "relay not allowed" message  -- your inbound gateway accepts traffic for a domain that does not actually exist on your main server.   

I would suspect a missing domain alias, such as:   the inbound gateway accepts traffic for "example.com" and "example.co".  The main server is supposed to have a domain alias that maps "example.co" to "example.com", but that alias definition is missing or mangled (e.g. "example.c0")
Tony Scholz Replied
9/30/2026 at 12:47 PM
Employee Post Marked As Answer
Hello, 

In this example; 

16:52:07.423 [192.168.1.22][42855208] cmd: MAIL FROM:<clientj@mydomain.com> 
16:52:07.423 [192.168.1.22][42855208] senderEmail(1):clientj@mydomain.com
16:52:07.423 [192.168.1.22][42855208] rsp: 550 Authentication is required for relay

The MAIL FROM domain is a domain on the server that has "Require SMTP Authentication" enabled. 

This example; 

16:52:22.452 [192.168.1.22][53865602] cmd: MAIL FROM:<A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com> BODY=8BITMIME RET=HDRS ENVID=799eb734-7114-44ef-af74-dd1db033aa2b SIZE=39840
16:52:22.452 [192.168.1.22][53865602] senderEmail(1): A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com
16:52:22.452 [192.168.1.22][53865602] rsp: 250 OK <A7CK9DEolTv2FJRhcsScpoQ==_1142121742813_ijvFcNVGEfC27gJCpkIu2g==@in.constantcontact.com> Sender ok

Is not coming from a domain on your server. 

Thank you
Tony Scholz
Lead Network/System Administrator
SmarterTools Inc.
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