Bug 910153 - [Email] email address in a plain message body is broken, when multiple sub domains present. r=mcav, r=psingapati

land https://github.com/mozilla-b2g/gaia-email-libs-and-more/pull/243
Merge pull request #11837 from asutherland/email-regex-fix

Bug 910153 - [Email] email address in a plain message body is broken, when multiple sub domains present. r=mcav, r=psingapati