Seems like a good place to mention this: I once was troubleshooting an Outlook issue where email stopped working after some time, seemingly at random. Turned ou

Seems like a good place to mention this: I once was troubleshooting an Outlook issue where email stopped working after some time, seemingly at random. Turned out that Outlook picked up the IP address for the mail server backwards - so instead of WW.XX.YY.ZZ Outlook tried ZZ.YY.XX.WW. Found that by using sysinternals network tools, confirmed with Wireshark. Thunderbird worked, ping to the domain name (of the mail server) worked, Outlook worked on-and-off, ... As it was MS Windows and I'm a Linux native I didn't really know how to investigate further - I guess I couldn't without Outlook source. Luckily setting a hosts entry fixed it. I only found one other post online with the same issue, and they didn't have a solution. Presumably it was something like ISP automated rDNS entries getting parsed .. but honestly I don't know. Still curious ... Would have loved to have found work investigating such things, as they said in the post, it's fun!