Ignore the 'm12si18241592qcu.131' -- that's just the ID that Google is
using to identify the SMTP session.  It looks to me like they're returning
the 5.5.1 in response to the 'DATA' command:

>    ----- Transcript of session follows -----
> ... while talking to alt1.aspmx.l.google.com.:
> >>> DATA
> <<< 502 5.5.1 Unrecognized command. m12si18241592qcu.131

Of course, DATA is a valid SMTP command, so I can only speculate what
might be 'unrecognized' about it.  Maybe some non-printable character
ended up in the data stream?  Since you're a Google customer, you probably
need to give them the transcript above.  Hopefully they still have old
enough log data to find the m12si18241592qcu.131 thread and see why the
transaction failed.

--
Liam Kelly
Senior Consulting Analyst
L-Soft international
[log in to unmask]

Read news, tips, and other information in our 'LISTSERV at Work'
archives at <http://www.lsoft.com/news/newsletter-us.asp>

############################

To unsubscribe from the LSTSRV-L list:
write to: mailto:[log in to unmask]
or click the following link:
http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=LSTSRV-L&A=1