530 5.7.0: authentication required
The server will not accept mail until you log in.
Rejected by policy or reputation
What 530 5.7.0 means
The SMTP server needs authentication before it will relay your message. Your client connected without credentials, or authentication was not offered on that port.
Common causes
- SMTP authentication not enabled in the mail client
- Using port 25 where authentication or STARTTLS is required
- Wrong server settings
How to fix it
- Turn on SMTP authentication with your username and password
- Use port 587 with STARTTLS or 465 with TLS
What to do with the address
Unrelated to the recipient address.
Check an address now with the free email checker, or look at a domain's mail setup with the email domain checker, MX lookup and SPF checker.
Related error codes
Frequently asked questions
- What does 530 5.7.0 mean?
- The server will not accept mail until you log in. The SMTP server needs authentication before it will relay your message. Your client connected without credentials, or authentication was not offered on that port.
- Is 530 5.7.0 a hard bounce or a soft bounce?
- Rejected by policy or reputation. It is usually about the sender, not the recipient.
- What should I do with the address after 530 5.7.0?
- Unrelated to the recipient address.