Similar Posts

Subscribe
Notify of
1 Answer
Oldest
Newest Most Voted
Inline Feedbacks
View all comments
HeinzHubert
6 months ago

The recipient’s server blocks your email either because it is configured incorrectly or because it blocks your domain.

This will happen if you use freemailers like Gmail, Yahoo, GMX, web.de ö ä. Since these are regularly abused for spam, admins block the domains in corporate networks.

You can’t do anything.