Wondering if any of you have run in to this before and can perhaps list a web reference on either Cisco or Microsoft about it.
Symptom: Email hanging in exchange queue
Platforms: Pix or ASA 7.0 or greater Exchange 2003 Microsoft DNS 2003
By default we all know that inspect DNS is on by default for 512byte packets on the ASA and int Pix 7.0 and above. In certain instance this will cause emails being sent to AOL and Comcast plus a few other mom and pops to hang in the exchange queue. The fix is to apparently change the DNS inspect to1500bytes.
I would have lost my shirt on this one because I would have bet every dollar I have that there is no way that a DNS inspect command could cause only certain emails to hang in an exchange queue. Block all maybe, but only a few....no friggin way.
This is not the first time that we have seen this. First time I have seen it, but a couple other engineers I work with have seen it/heard of it before.
Anyone ever heard of this beofre?