For the second time in about a month, the emails I've sent out never make it to their destination. This happened a few weeks ago, for about a day. I use thunderbird, and for a day or so, all of the emails I sent out never made it to their destination. I never got an error message, and they didn't end up in anyone's junk folder, they just disappeared. This happened again last night, where I sent out 8 email messages to different people, and none of them arrived.
How can I figure out where the problem is to try to fix it? I have been very frustrated with support from Lunarpages in the past, so I'd like to figure out as much as possible on my own before I contact them. Is there a way to track outgoing email, so I can find the point at which it stopped?
As a temporary solution I am sending everything out through my google gmail account, but that's not a good long term plan, because it gives everyone the wrong email address (I don't want anyone sending mail to my gmail, I want it delivered to the other accounts I have used over the last 15 years).