Interoffice emails on whitelisted accounts are not going through.
We are a small company (less than 10 people) and we use Thunderbird to send each other reminders/supply lists, etc. Sometimes, emails will go through, other times nothing. It will show as successfully sending from the sent folder, but will never arrive in the inbox. I've got our company emails white-listed on both Thunderbird as well as our mail server, as well as specific individual rules saying to send anything from specific emails to the inbox. Nothing so far has worked.
Wšykne wótegrona (1)
the address book is the white list for Thunderbird treating a message as spam, but what you are talking about is completely vanishing. I really doubt that is a Thunderbird issue. More likely to be server side spam rejection, perhaps from a plug in appliance like those some anti virus companies sell.