-={ 2021-04-13 13:52:13.576038337+00:00 }=-

Hey Wilfred!

 WvV> @MSGID: 1:153/7001 8QIOgQad
 WvV> @MSGID: 1:153/7001.2989 8QIOgQad

Those were the original tests to ensure that the addresses are indeed part of dupe checking which obviously they are since they show up here on the Europoint.  However the third test was an original, fully compliant MSG with a duped MSGID matching "@MSGID: 1:153/7001 8QIOgQad" that doesn't show up here or anywhere beyond 1:153/757 which is 1:153/7001's uplink.

For the record we repeated the test on a local echoarea that all concerned have access to and it 'failed' again which is exactly what was suspected.  Therefore we all concluded that dupe checking is ONLY based on MSGIDs given all were original and compliant MSGs.

If you want I could repeat the third test here just to see how far your dupe checking goes when encountering a duped MSGID.  I think it was worthwhile.  Also the EuroPoint uses the 32-bit hex unixtime for it's serial numbers instead of the random 8 character [:alnum:] regex one but that shouldn't matter.  What will matter is your dupe checker's abilities to differentiate between a real dupe and one where only the MSGID is duped.

Let me know and I'll make it so.

Life is good,
Maurice

... Yldo beo¨ on eor¨an ‘ghw‘s cr‘ftig.
    Old age has power over everything on earth.
--- GNU bash, version 5.1.4(1)-release (x86_64-motorshed-linux-gnu)