If you reply using email, gmail add
El 2/7/2015 3:11 p. m., “MiguelAngelLV” firstname.lastname@example.org escribió:
The format is: datetime, nick of last user, email address that send the email, and “wrote” o “escribió” in spanish, and this message is show in the reply, example
I know that “this is not a bug of Discourse”, but gmail is a popular email.
Would be added a regular expression or something to remove the message?