Mozilla will linkify sometext:someothertext@foo.com even though colons are prohibited in email addresses by RFC 2822. The code that linkifies email addresses should check that there is a continuous string of atext characters (defined in RFC 2822) followed by an @ sign with more text after that. See bug 97835 for related info.

I am guessing (not knowing much about C) that the problem lies in the fact that the colon is left out of the prohibited characters listed in mozTXTToHTMLConv::FindURLStart and mozTXTToHTMLConv::FindURLEnd. I will update those prohibited characters on my local tree and see if that doesn't fix the problem. If so, I will attach a patch here.

> guessing ... the colon is left out of the prohibited characters Colons are definitely allowed in URLs. > Mozilla will linkify sometext:someothertext@foo.com even though colons are > prohibited in email addresses by RFC 2822. Knowing what is allowed in email addresses is the job of the mailto URL parser in Necko, not the linkifier code. I thus think that this is a dup of the bug to improve the mailto parser. *** This bug has been marked as a duplicate of 32442 ***