EM-3606
The mail server is temporarily unavailable
Why it happens
Your SMTP server answered that it cannot accept the message right now (load, maintenance or a temporary sending limit). Rabt retries automatically. The server’s full message is in the technical details.
What to do
Nothing to do for now: the message is sent once the server accepts it. If it keeps happening, check your email provider’s sending limits.
- HTTP status
- 503
- Retrying can help