I am using MailApp.sendEmail function to send emails from a google sheet. While testing I made use of gmail's feature that allows you to create "new" email addresses from your own using the plus sign to generate lots of different test email addresses.
i.e. if my address is [email protected] I can also use [email protected]
Strangley, when I send my test emails using MailApp.sendEmail using one of these email addresses it never arrives, but if I send it to my own base address it does.
Is this an "undocumented" feature or am I missing something that allows it to work?
thanks