valid characters for tags not working from email

espressodaily says:
In a previous post it said:"Aside from letters, numbers, and international characters, the valid characters for tags are:
+ - . @ _
If I use these tags in an email that I send into RTM, the task comes in w/o any tags
+ - . @ _
If I use these tags in an email that I send into RTM, the task comes in w/o any tags


espressodaily says:
Actually, through testing, I found that my signature was throwing off tags. It works with HTML format and text format.
Thanks
Thanks