Add extra features and styles to make Thunderbird your own.
Check out our Mobile Add-ons site.
by earlpiggot on Oct. 19, 2015 · permalink
I couldn't live without this superb extension.But lately, I keep getting the warning "The message contains multiple recipients.", whenever a message I send contains multiple recipients. How do I get rid of this annoyance?
To create your own collections, you must have a Mozilla Add-ons account.
Create an Add-ons Account
or log in to your current account