mantastic36
MIS
Hello All.
I have a very strange issue which I cannot seem to identify or fix. Here's the stats...
Multiple exchange 2003 servers at multiple sites. All sites are on Active Directory 2003. SMTP traffic is routed through DMZ through SMTP gateway (Brightmail 6.0 running on Linux platform). And then is being scanned on mailbox store via and Antigen agent.
OK... The strange problem... I have one distribution group, defined as a security group, which is also email enabeled, both for exchange members of the domain and for outside users. In other words anyone can send to this group courtesy of and SMTP address. OK if I send an email internal from same domain through exchange, all users receive the message, and no NDR is returned... Here's the quirky thing... If I send from outside address using SMTP address I get and NDR with error code 5.1.1. And the NDR suggests that someone does not exists at this address, basically it's telling me that the address doesn't exist.. Now this address getting refused was from a previous user who no longer works at this company... So the NDR only goes to external users...
I've recreate the group in active directory and the problem still occurs... It's as if the SMTP address is somehow still mapped to this previous user... I've checked ADSI edit and found no attributes that relate to this not existent user object and I have looked into delegation but this seems to have more to do with calendar and meeting requests then just regualr emails. Not to mention if delegation had somehting to do with it, I have already tried removing all users from the group and issue still happens.
SO I am preplexed any ideas?
Thanks
I have a very strange issue which I cannot seem to identify or fix. Here's the stats...
Multiple exchange 2003 servers at multiple sites. All sites are on Active Directory 2003. SMTP traffic is routed through DMZ through SMTP gateway (Brightmail 6.0 running on Linux platform). And then is being scanned on mailbox store via and Antigen agent.
OK... The strange problem... I have one distribution group, defined as a security group, which is also email enabeled, both for exchange members of the domain and for outside users. In other words anyone can send to this group courtesy of and SMTP address. OK if I send an email internal from same domain through exchange, all users receive the message, and no NDR is returned... Here's the quirky thing... If I send from outside address using SMTP address I get and NDR with error code 5.1.1. And the NDR suggests that someone does not exists at this address, basically it's telling me that the address doesn't exist.. Now this address getting refused was from a previous user who no longer works at this company... So the NDR only goes to external users...
I've recreate the group in active directory and the problem still occurs... It's as if the SMTP address is somehow still mapped to this previous user... I've checked ADSI edit and found no attributes that relate to this not existent user object and I have looked into delegation but this seems to have more to do with calendar and meeting requests then just regualr emails. Not to mention if delegation had somehting to do with it, I have already tried removing all users from the group and issue still happens.
SO I am preplexed any ideas?
Thanks
