Update:
Problem originated at the UBB forum. This is the message received from the host ISP
"We checked the logs and saw no mail even attempted delivery to you from UBB to our mail service. So, we tried a reboot to see if it affected anything. Afterwards, we see several Emails in the logs delivered to you. Seems like another windows issue."
Following the reboot, I have received all the missing notifications, personal messsages, password updates, etc. Nothing missing now. No options were changed. The problem seemed like it occurred at about the same time as my removing e-mail notification (inside my profile) on about 10 postings while leaving another 10 postings with notification enabled. I don't believe(?) I received any further e-mails from the forum after that change. I am not 100% certain of the exact timing but all e-mails of all types stopped coming.
Based on the above message, we know the e-mails were still being generated but why did they not get sent to the mail server?
