I am using the following to send emails which works on localhost but not my server.
// server
Meteor.startup(function () {
process.env.MAIL_URL=\"smtp://
I encountered a similar problem. The method send email work locally but not on the hosting modulus. For my part this was due to a blocking google security (access to my gmail account from Seattle while I live in France has probably seemed fishy to google). I went through several pages to authorize less strict connections to my gmail account. On this page I saw the blockage. So I allowed the less secure applications and allowed access to my account.
If it helps someone ..