emailer

noun

1. One who, or that which, sends an email.

   “Pakistani police said on Tuesday that they have launched a hunt for an emailer whose threatening message to New Zealand cricketers nearly jeopardised their tour to Pakistan.”

   “16 April 2007, Manchester Evening News - Golden rules of e-mailinghttp://www.manchestereveningnews.co.uk/news/technology/s/1004/1004551_golden_rules_of_emailing.html Other lessons on so-called `netiquette' the book dishes out are of a more moral tone - for instance, it says that an emailer should never mention anyone in an email who they would not be happy to show the content to.”

   “I also asked whether there had been any complaints (having been made aware by an emailer that he had put in a formal complaint to the website).”