USB to COM Port connections

[Mickey]

On 05/26/2015 11:16 AM, Ed Greshko wrote:
> On 05/26/15 22:48, Mickey wrote:
>> The only Stinking thing I use to post is Thunderbird, and if it using HTML it not my fault.
> Well, sadly, yes it is your fault.  :-)
>
> Unfortunately most, if not all, email user agents default to sending messages in HTML.  It is a simple matter to configure T-bird to send plain-text only messages as the default or to certain domains.
>
Ed, I look through Thunderbirds Preferences and I could not find those 
settings, where are they located ?