"Server not found" or DNS resolution error
This error means the SMTP or IMAP hostname you entered does not exist or cannot be resolved by DNS. The mail server address is incorrect.
Common causes:
- Typo in the hostname — Double-check for misspellings (e.g., 'smpt.gmail.com' instead of 'smtp.gmail.com').
- Using your domain instead of the provider's hostname — For example, entering 'mail.yourdomain.com' when you should use 'smtp.gmail.com' (Gmail) or 'smtp.office365.com' (Outlook).
- Domain expired or DNS not configured — If using a custom domain, verify it has not expired and has valid MX records.
- Temporary DNS issue — Try again in a few minutes. If persistent, try using a different network or contact your internet provider.
Correct hostnames for common providers:
- Gmail: smtp.gmail.com (SMTP), imap.gmail.com (IMAP)
- Outlook/M365: smtp.office365.com (SMTP), outlook.office365.com (IMAP)
- Hostinger: smtp.hostinger.com (SMTP), imap.hostinger.com (IMAP)
- Zoho: servers follow the region. A mailbox on your own domain uses smtppro.zoho.in and imappro.zoho.in in India, .eu in Europe, and .com in the US (port 587 to send, 993 to receive). Personal Zoho mail uses smtp.zoho and imap.zoho with the same ending. Turn IMAP on in Zoho, and use an application-specific password when two-factor sign-in is on.
- Yahoo: smtp.mail.yahoo.com (SMTP), imap.mail.yahoo.com (IMAP)
Debugging: Copy-paste the hostname from the Provider Setup Guides above to avoid typos.