This is not a question, but some feedback I've been wanting to give for a while. When I reply to a message, Thunderbird thankfully does not spell check the letter I am replying to, just my own content. However, Thunderbird prefaces the original content with something like: On 1/13/2020 8:26 AM, CJ Girard (Lightspeed Retail Support) wrote: Spell check inevitably flags the name of the of person I'm replying to. There is no need for this, and it should know better. Can some scripting be added to the spell check function that causes it to overlook that automatically generated line that prefaces the replied-to text? If the reply message included that automatically generated line in the "reply" text then it would be ignored. I hope that all makes sense.