Add MAIL_FROM environment variable

Otherwise the mail comes from no-reply@meteor.com, which will fail a
lot of spam tests.

Closes #407

History.md

@@ -11,7 +11,7 @@ This release features:
 * Support images attachments copy pasting.
 
 Thanks to GitHub users AlexanderS, fisle, floatinghotpot, FuzzyWuzzie, ndarilek,
-and xavierpriour for their contributions.
+SirCmpwn, and xavierpriour for their contributions.
 
 # v0.9
 

config/accounts.js

@@ -46,3 +46,9 @@ AccountsTemplates.configureRoute('changePwd', {
     Popup.back();
   },
 });
+
+if (Meteor.isServer) {
+  if (process.env.MAIL_FROM) {
+    Accounts.emailTemplates.from = process.env.MAIL_FROM;
+  }
+}