Email Stuck in "Retry Queue" – Host Not Reachable

Email Stuck in "Retry Queue" – Host Not Reachable

Hello everyone,

I’ve been encountering an issue when trying to send emails. Although the email appears in my Sent folder, it doesn’t reach the recipient, and I see the following status:

In Retry Queue
Temporary failure when delivering email to the recipients. Emails in queue will be retried automatically.
Host not reachable.

Could anyone help me understand why this is happening and what steps I can take to resolve it?

Any advice would be greatly appreciated. Thank you!