Avatar: User Icon's should not contain special characters
From geary#1260
It seems like if an address contains braces those may be treated as part of a person's name. The generated user icon (not sure if that is the correct term) then contains that character. In the screenshot below this results in the icon to be "Y(" instead of "Y".
There might be other special characters that cause similar issues, e.g., colons.
Note: we already tried to solve this issue addressing folks
directly, but without success.