I can't find any details on what this attribute is suppose to do...

Back story,

I have Trend IMSVA as our mail relay, I recently enabled back-scatter prevention (bounce back spam emails) this required allowing IMSVA to query AD for legit users. After I enabled this feature, all my additional domain extensions for SMTP stopped working and the mail relay would bounce all those extensions till i unchecked the query AD feature of IMSVA.

I was trying to get this sorted out by Trend support but sadly the tier one dink spent 2 hours "Diagnosing" the issue which I told him what it was right from the beginning.. after two days I asked if it had been escalated and he replies ..

"Yes I have escalated the case however it appears like the issue has nothing to do with the Cloud-prefilter. It seems like this has something to do with the LDAP settings or the Active Directory. "

And then asks for me when I'm available to waste more of my time... I told him that was the issue right when I called them!!! and escalating it means getting a tech who knows how to fix it, nit waste more of my time! 

Anyway, I decided as usual to try and fix this issue myself, unfortunately I don't know what he IMSVA is doing for a query to identify legit users addresses, I feel if its just the "mail" attribute of the user account in AD, then I'd be screwed cause AFAIK you can only specify a primary email address in there?

So I thought maybe thi sattribute might hold the key. So I added my other email extensions in full in that attribute, but all that managed to do was break my other extensions (even with the check LDAP on IMSVA disabled) So I had to revert that change.

I googled but I couldn't find anything indicated what this attribute is used for... does anyone know?

Any thing checking SMTP addresses would hopefully query against the proxyaddresses attribute that are type SMTP

Dang, I was afraid of that, cause I checked that attribute and they are listed in there, as {SMTP:username@extension1.we, SMTP:username@extension2.we}

I really hope this tech actually escalates my issue, or I'm gonna have to start looking for a new mail relay..

Suggestions? lol

Does anyone know what this attribute is used for? even besides my back story it'd be nice to know what its used for, googling it didn't bring up any significant info other than it was introduced into the schema in 2008 R2 SP2. besides that no reference as to its use.

Dang, I was afraid of that, cause I checked that attribute and they are listed in there, as {SMTP:username@extension1.we, SMTP:username@extension2.we}

I really hope this tech actually escalates my issue, or I'm gonna have to start looking for a new mail relay..

Suggestions? lol

Was never impressed by IMSVA.  If you want to stay the hosted path, there's EOP, Barracuda, AppRiver, and probably a whole bunch of others.  I've personally been a fan of Barracuda for a while, but I've had clients who used AppRiver as well.

As for the attribute, I don't know what it's purpose is; sorry.

Hey Thanks B0ndoo!!

Yeah I feel Trend has dropped the ball majorly in most of their products, I feel the slip way more within WFB...

I had a couple instances where scanning a file in WFB 9.0+ to report its fine, then to paste the same file in Virustotal website and report it was a exploited PDF that was vulnerable in 11.0.2 ( I was on 11.0.8 at the time thus the exploit never took off... 

Had I not kept up to date on my users software, this could have been far worse.

Again thanks for the suggestions.

I don't think anyone here in the forms will know what that variable does since MS is so great at documenting all the technical details behind their products.

Was worth a shot anyway.