Sending Email Through Firebase Cloud Functions

I have a big query table containing email of the users and i want to send them a newsletter email ( around 500 rows in table) When the function runs it only sends email to 30-35 us

Solution 1:

If you store your emails like this:

var someVar = ['someemail@mail.com', 'another@mail.com'];

You can do something like this:

var someVar = ['client@mail.com', 'another@mail.com'];
var sendTo = someVar.join(','); 
var mailOptions = {
  from: 'truironusa@gmail.com', // sender address
  to: sendTo, // list of receivers
  subject: 'My newsletter', // Subject line
  html: '<b>content</b>', // html body// plain: 'Some text' // plain text
};