Hi!
I just sent an email to sales@particle.io and got the reply:
Delivery to the following recipient failed permanently:
sales@particle.io
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain particle.io by aspmx.l.google.com. [2607:f8b0:400e:c04::1b].
The error that the other server returned was:
550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient’s email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 http://support.google.com/mail/bin/answer.py?answer=6596 o16si19603153pdj.244 - gsmtp