We have this strange situation: not all recipients receive a message, when it sends to QBDG. At the same time when you click on Preview of QBDG, all necessary users are present. For now in our organization we have Exchange 2010 and Exchange 2003. Query-based Distribution Groups were formed in Exchange 2003 more than 1 year ago. We have also limit for number of recipients – 100 on Organization level. Quantity of mailbox-servers in the Exchnage 2003 organization on is 20. In properties of all QBDGs NDRs are disabled and as Expansion server specifies any server. Unfortunately, there is no possibility to test the problem, because our users are very serious and do not like being disturbed. But I can analyze experience based on sending three messages: 1) New message. In properties of user account, who was sending it, we have individual limit for number of recipients: 10000. In the "To" field user specified addresses of several QBDGs. Sender's mailbox is already in the Exchange 2010 environment on server1. According to the message tracking in Exchange 2010, groups expanded on server1, message was sent to 992 recipients: 646 recipients are also on server1, and they received a letter. Another 346 recipients are in Exchange 2003 environment. So we went to the server2, which receives messages from Exchnage 2010, analyzed SMTP logs. We saw that the message is From: <>, not from the sender, but all 346 recipients are presented in the log, some of them are on server3 in the same administrative group as server2, some - on server4 in another administrative group. SMTP-logs on server3 and server4 do not have all the recipients, but only 10 (on server3) and 1 (on server4) instead of 346. No errors in the SMTP-logs on all servers. Started the message tracking on server2, nothing unusual, but we saw "SMTP Report Absorbed"-line 2 times. How to deal with it and what is that exactly - I wasn't able to find. 2) New message from the same sender to just one QBDG, number of recipients - 92. Message also addressed to users with mailboxes on server1, server3, server4. All recipients received the message. 3) New message from the same sender to QBDG which includes mailboxes of all users (about 9000). Recipients are from all servers in different administrative groups and different environments. QBDG expanded on server1, on server2 in SMTP-logs all recipients from Exchange 2003 environment are presented, but again we saw that the message FROM: <>. Recipients with mailboxes on server1 received the message. In Exchange 2003 environment the message received only by a few recipients on each server. By Message Tracking we saw "SMTP Report Absorbed"-line several times. Can you please tell where to dig? I'm really confused...

On Fri, 4 Mar 2011 09:27:03 +0000, Uni_cut wrote: > > >We have this strange situation: not all recipients receive a message, when it sends to QBDG. At the same time when you click on Preview of QBDG, all necessary users are present. > > > >For now in our organization we have Exchange 2010 and Exchange 2003. Query-based Distribution Groups were formed in Exchange 2003 more than 1 year ago. We have also limit for number of recipients ? 100 on Organization level. Quantity of mailbox-servers in the Exchnage 2003 organization on is 20. In properties of all QBDGs NDRs are disabled and as Expansion server specifies any server. > > > >Unfortunately, there is no possibility to test the problem, because our users are very serious and do not like being disturbed. But I can analyze experience based on sending three messages: > > > >1) New message. In properties of user account, who was sending it, we have individual limit for number of recipients: 10000. In the "To" field user specified addresses of several QBDGs. Sender's mailbox is already in the Exchange 2010 environment on server1. According to the message tracking in Exchange 2010, groups expanded on server1, message was sent to 992 recipients: 646 recipients are also on server1, and they received a letter. Another 346 recipients are in Exchange 2003 environment. So we went to the server2, which receives messages from Exchnage 2010, analyzed SMTP logs. We saw that the message is From: <>, not from the sender, but all 346 recipients are presented in the log, some of them are on server3 in the same administrative group as server2, some - on server4 in another administrative group. SMTP-logs on server3 and server4 do not have all the recipients, but only 10 (on server3) and 1 (on server4) instead of 346. No errors in the SMTP-logs on all servers. Started the >message tracking on server2, nothing unusual, but we saw "SMTP Report Absorbed"-line 2 times. How to deal with it and what is that exactly - I wasn't able to find. You said that the NDRs are disabled on the groups, so using the null sender ("<>") is how they're suppressed. No MTA will send a NDR to that address. The fact that you're seeing the event that says the DSN *would* have been sent should be a clue that Exchange 2003 is objecting to something. >2) New message from the same sender to just one QBDG, number of recipients - 92. Message also addressed to users with mailboxes on server1, server3, server4. All recipients received the message. > > > >3) New message from the same sender to QBDG which includes mailboxes of all users (about 9000). Recipients are from all servers in different administrative groups and different environments. QBDG expanded on server1, on server2 in SMTP-logs all recipients from Exchange 2003 environment are presented, but again we saw that the message FROM: <>. Recipients with mailboxes on server1 received the message. In Exchange 2003 environment the message received only by a few recipients on each server. By Message Tracking we saw "SMTP Report Absorbed"-line several times. Since all the intended recipients appear in the RCPT TO commands sent to the Exchange 2003 server, and you have the message tracking logs from the Exchange 2003 servers, how many of the recipients received the message? Was it 100, or 200, or some multiple of 100? When Exchange 2010 expands a distribution group it "chips" the expansion into groups of 1000. So your 9000 would result in 9 (or 10) groups of e-mail. If there, say, 400 of those addresses on Exchange 2003 you may have received up to 9 (or 10) groups of mail sent to E2K3, or you may have received only 1 (if they were all in the same "chip"). > > > >Can you please tell where to dig? I'm really confused... --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Ok, but how can I understand to what exactly is Exchange 2003 objecting? How to find the cause of problem?...

On Fri, 11 Mar 2011 11:12:08 +0000, Uni_cut wrote: > > >Ok, but how can I understand to what exactly is Exchange 2003 objecting? How to find the cause of problem?... I'd start by looking at the SMTP protocol logs. If all the RCPT TO commands are accepted then go have a look at the message tracking logs. If they're not helpful then increase the diagnostics logging levels on the Exchange 2003 servers and keep an eye on the application event logs. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP