REading SMTP log from exchange server

Can someone assist me how to read the SMTP code in the following email?
We had problem receiving emails from a sender and I fixed the problem, it was filtered by spam filter. But I am trying to understand for next time for troubleshooting.
Mydomain.com is my domain which receives this email and the below code was generated in my domain email server( windows 2003 and exchange server 2003)

2015-10-12 12:19:04 167.89.xxx.xxx o167812c23.outbound-mail.sendgrid.net SMTPSVC1 EXCHANG_SERV 192.168.1.20 0 EHLO - +o167812c23.outbound-mail.sendgrid.net 250 0 276 43 0 SMTP - - - -

2015-10-12 12:19:04 167.89.xxx.xxx o167812c23.outbound-mail.sendgrid.net SMTPSVC1 EXCHANG_SERV 192.168.1.20 0 MAIL - +FROM:<bounces+1765840-0644-reservations=mydomain.com@sendgrid.net> 250 0 88 75 0 SMTP - - - -

2015-10-12 12:19:04 167.89.xxx.xxx o167812c23.outbound-mail.sendgrid.net SMTPSVC1 EXCHANG_SERV 192.168.1.20 0 RCPT - +TO:<reservations@mydomain.com> 250 0 0 39 16 SMTP - - - -

2015-10-12 12:19:04 167.89.xxx.xxx o167812c23.outbound-mail.sendgrid.net SMTPSVC1 EXCHANG_SERV 192.168.1.20 0 DATA - +<0E69F3E19AB4E37DEEACF8090088BD4F0C16C9B5@COMM-RELI-IAD2> 250 0 141 100670 391 SMTP - - - -

2015-10-12 12:19:06 167.89.xxx.xxx o167812c23.outbound-mail.sendgrid.net SMTPSVC1 EXCHANG_SERV 192.168.1.20 0 QUIT - o167812c23.outbound-mail.sendgrid.net 240 2109 70 4 0 SMTP - - - -

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In the above smtp code,

what are 250 0 141 1000670 391 SMTP and 240 2109 70 4 0 SMTP?

I understand 250 is success, but then what are the trailing codes, 0 141 1000670 391?
And also 240 (What is this?) and  2109 70 4 0 SMTP?
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crcsupportAsked:
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Rich WeisslerProfessional Troublemaker^h^h^h^h^hshooterCommented:
I believe the first line of the log... or the first line after a system restart will contain a list of the 'column headers', and that final bit you are asking about should be:
sc-status sc-win32-status sc-bytes cs-bytes time-taken cs-version

Checking the field abbreviations,
sc = Server to client
cs = client to server

I believe the 250 status is successful delivery to a mailbox, and 240 status is successful delivery to be forwarded (relay).
sc-win32-status
0 = "The operation completed successfully."
2109 = "The network connection was made successfully using default credentials."

Then it's bytes moving from server to client
Then bytes moving from client to server
Then time taken to transfer (I assume ms).
And finally protocol used (client to server)...
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