Rated 3 out of 5 stars

deur andrybak op Feb. 4, 2023 ·

The addon only wraps the lines visually. The actual outgoing emails will still have very long lines, which is not good for plain text mailing lists.

Dié resensie is oor 'n vorige weergawe van dié byvoeging (1.4.1). 

deur Jan Kiszka (ontwikkelaar) op Feb. 4, 2023 ·

Did you "make sure that "mailnews.send_plaintext_flowed" is disabled" (see add-on description)? If so, please share more details about your setup.
Your use case is also my use case and the primary reason why I'm maintaining this.