- EliezerNAnswered on August 06, 2013 at 03:28 PM
Thanks for contacting us.
I have already removed your email from the bounce list, So it should work correctly now.
Result: firstname.lastname@example.org was IN the bounce list
Reason(s) : 5.1.0 - Unknown address error 550-'#5.1.0 Address rejected.'
Please refer this guide to prevent this issue to happen again: How to setup email alerts to prevent email bouncing related issues
Let us know if you need further assistance.