I keep getting an error message when trying to send emails, what does it mean?

1. Check your network connection to make sure it’s working properly.
2. Resolve any firewall issue that may be blocking your connection to the email server.
3. Verify your SMTP address and port settings are correct.
4. Check your email account credentials to ensure they are entered correctly.
5. Ensure you have enough storage space in your mailbox to accept new emails.