I cannot seem to find how to blacklist certain emails for Thunderbird. Although I have not been a contractor for 15 years, I still keep getting emails for take-off services and always from different addresses, so blacklisting a specific address would not be very helpful. Sometimes I get a dozen a day. "take-off" would be a great term to use for blacklisting as none of my customers would use that; I've been a professional gunsmith for those 15 years. Any help/suggestions on this matter would be greatly appreciated! Thanks, Wolfgang