17 May
2010
17 May
'10
7:17 a.m.
On Mon, May 17, 2010 at 6:08 AM, Jay R. Ashworth <jra@baylink.com> wrote:
No discernable delay on close. So apparently at least *some* Blackberry incoming MXs are broke. Improperly thinking I'm on a blacklist, and dropping the connection without telling me why is a valid value for "broke".
Yet it does seem that's the kind of "broke" that is occurring. I'm seeing a 100% success rate in connecting from a datacenter IP, and 100% failure rate (with the same symptoms you've described) from a cable modem IP. I believe the RIM BIS front-end boxes are IronPorts, so checking your IP's SenderBase score would be a good place to start (http://senderbase.org) Scott.