I don't remember if this issue was resolved for those PDMLers who were affected by the arrogant and stupid decision of the Thunderbird developer, - to ignore "Reply-To:" header from the mailing list.
Just in case it had not been suggested here, on the list, - here is a brief instruction on how that can be "reverted" to the old behavior:
Tools -> Options -> "Advanced" tab -> General -> (under Advanced Configuration) "Config Editor".
Acknowledge the threat of destroying the universe by creating a black hole. Then type/paste this into the entry field:
mail.override_list_reply_to Click on it to change the value to "false". You may need to restart the program, I don't know for sure. HTH, Igor -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.