smtp connections

What are Common SMTP Errors and How to Fix Them?

Common SMTP errors include:
Authentication Error (535): Check your login credentials or contact your service provider.
Connection Timeout (421): Ensure your server is available and not overloaded.
Relay Denied (550): Configure your SMTP server to allow relaying, or contact your service provider.
Mailbox Full (552): Advise the recipient to clear their inbox or increase their storage limit.

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