SMTP Error 211 - System status or help reply. | Warmup Inbox
The short answer
System status or help reply. Common cause: The server is returning diagnostic or status information you asked for.
Quick fix
Not an error — read the text that comes with it.
2 - Success. Not an error - the server accepted or completed the action.
How to fix it
Not an error — read the text that comes with it.
Related codes
- 214 Help reply.
- 220 Service ready.
- 221 Service closing transmission channel.
- 235 Authentication successful.
- 250 Requested action completed.
- 251 User not local; will forward.
Ready when you are
Most rejections come back to sender reputation.
Blocklists, auth failures, and policy blocks are what warmup prevents. Warm up your domain so your mail is trusted before you hit send.