different contacts same email address

People working in a corporate marketing world often have a single corporate email for customer contact, and each employee shares that with their own name. Their internal system may filter for each person, but thunderbird cannot know that. Yes, it's a beautiful day. Enjoy it. I just took a brief walk.  :)

Yes and no. I understand that Thunderbird cannot know how the receiving system filters the email. But why is it that Thunderbird is not able to show the correct full email address in the "TO" line when reading from the sent mail folder or in the "Correspondents" column for the sent folder? Aren't these entries the same full email address for each individual as when I created the email?

Try checking your settings for how email address is displayed at settings>general. That may be useful

Nothing there -- thanks.

Change your [ Settings \ General \ Message List \ Preferred address display format ] to Full Name and email address to see if it helps.