Email providers
Pick a provider to see the reply codes they return. For step-by-step Gmail, Yahoo, Apple, and Outlook fixes, see the bounce playbooks.
Googlegmail.com, googlemail.com
Yahoo Incyahoo.com, aol.com
AT&Tatt.net, sbcglobal.net
Comcastcomcast.net
Appleicloud.com, me.com
Mail.rumail.ru
Outlookhotmail.com, outlook.com
Yandexyandex.com
Zohozoho.com
Rambler
Amazon Simple Email Service
Free
GoDaddy
GMX
Hey
Orange
QQ
Rackspace
Infomaniak
Hostpoint
ProtonMail
ImprovMX
Web.de
Response catalog adapted from the MIT-licensed SMTP Field Manual by ActiveCampaign / Postmark.