Comment 4 for bug 1745512

Messages logged by the MTA look like relatively typical patterns for the notification mechanisms askbot provides. Some of the rejections logged also mentioned the IPv4 address showing up on the Spamhaus PBL (which is not uncommon for Rackspace servers so we tend to file exceptions for them if we know they'll be sending E-mail), but Spamhaus's lookup form does not indicate this is actually the case either.

I also ran a packet capture on the server looking at all SMTP traffic, and didn't see any being sent outside the MTA (e.g., via direct socket connections).