I had read about how groups.io processes bouncing in the wiki and I had also asked about this on the GMF forum.  What I found is that a 554.30 mail box disabled is not seen as a hard bounce and will not trigger groups.io to process the member as bouncing.  My problem is, members who are on special notices only in our group only get one email per month.  It bounces but it isn't enough to trigger the bounce status in the member list as it does not satisfy the 4 continuous days (or bounces) of bouncing.  So these types will build up in the list forever.  Apparently if a account is closed that would trigger bouncing after the first "hard" bounce.  But if an account is disabled it's not for 4 days or bounces.  See cut and paste from a guy who just came on bounce status today.  This guy did take 5 occurrences to show up and was placed on bounce status.  However had he been on special notice it would never happen.  We moved over to groups.io with the automated method you provide in Oct/Nov.  We had 1500 members in Yahoo on nomail, most had been members a decade or more.  I knew many were no longer valid and before the move I disallowed nomail so all those people were put on special so that they would show up as bouncing and I could eliminate them.  Many bounced as accounts do not exist and I removed them but many I saw looking at samples of the email delivery history had disabled boxes and were not put in bounce status.  So I went through all 1500 one at a time and when I found the 554.30 I removed the member.  It's now down to 900 members on special only and all are with yahoo email addresses.  I'm told on GMF that a 500 level error should trigger after one bounce.  So I opened this issues with a bug hashtag.  I do realize there could be reasons why this is not a bug but the specter of having to periodically go through that many members once a year or so to clean things up compelled me to open this and hope for the best.  Thank You

John P

When	Message	Reason
2:59am	Digest #53	mta7.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4266.mail.bf1.yahoo.com
Jan 21	Bounce probe	mta6.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4018.mail.gq1.yahoo.com
Jan 20	Digest #52	mta7.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4362.mail.bf1.yahoo.com
Jan 20	Digest #51	mta7.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4080.mail.bf1.yahoo.com
Jan 19	Digest #50	mta7.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4312.mail.gq1.yahoo.com
Jan 18	Digest #49	mta6.am0.yahoodns.net: 554 delivery error: dd Sorry, your message to bautista_2010@... cannot be delivered. This mailbox is disabled (554.30). - mta4463.mail.bf1.yahoo.com