What causes emails to be received but not sent?

Usually, incorrect SMTP server settings, blocked ports, or firewall and antivirus restrictions can prevent sending emails even when receiving works fine.

How can I fix my SMTP server settings to send emails?

Verify that your outgoing SMTP server address, port numbers (such as 465 or 587), and SSL/TLS encryption settings match your email provider’s recommendations.

Can firewall or antivirus software block sending emails?

Yes, firewall or antivirus programs can block outgoing email traffic. Whitelisting your email client or adjusting security settings may resolve this.

Which SMTP ports should I try if sending emails fails?

Common SMTP ports to use are 465 and 587, which support SSL or TLS encryption required by many email providers.

Why Can I Receive Emails but Not Send Them? Common SMTP Issues Explained

Learn why you can receive but not send emails and how to fix SMTP server settings, port issues, and firewall blocks.

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Jun 27, 2026

Check server settings: If you can receive but not send emails, verify the outgoing (SMTP) server settings are correctly configured. Test different ports: Try using standard ports like 465 or 587 for SSL/TLS encryption. Permission issues: Ensure you have the right permissions from your email provider. Firewall or antivirus checks: Sometimes, these can block outgoing emails, so whitelist your email client. These steps should help diagnose and resolve most issues.

FAQs & Answers

What causes emails to be received but not sent? Usually, incorrect SMTP server settings, blocked ports, or firewall and antivirus restrictions can prevent sending emails even when receiving works fine.
How can I fix my SMTP server settings to send emails? Verify that your outgoing SMTP server address, port numbers (such as 465 or 587), and SSL/TLS encryption settings match your email provider’s recommendations.
Can firewall or antivirus software block sending emails? Yes, firewall or antivirus programs can block outgoing email traffic. Whitelisting your email client or adjusting security settings may resolve this.
Which SMTP ports should I try if sending emails fails? Common SMTP ports to use are 465 and 587, which support SSL or TLS encryption required by many email providers.

Watch More

If you're experiencing issues with sending emails despite being able to receive them, exploring related content on configuring SMTP servers, managing email client permissions, and resolving firewall restrictions can further help ensure smooth email communication.

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