I Can’t Send Emails From My Server

If you cannot send emails from your server, your server IP address may have been listed in public spam blocklists. You can check your IP status using such online tools as MxToolbox.

If your IP is not blocklisted, check if the connection to remote servers is working using the following command via shell:

telnet smtp.gmail.com 25

If the connection to the remote server fails, check firewall settings and see if you have received any email notifications suggesting that IPs are limited due to spam.

A mail filtering system could block port 25 for your IP. To confirm whether or not this has happened, check the email linked to your Heficed account for a notification suggesting that your IP may have been blocked temporarily. Such notifications are sent automatically if mailing activity triggers Heficed anti-spam rules.

This could happen due to several reasons, including:

  • Misconfigured mail service on your server
  • Bulk emailing
  • Low quality email content

Our recommendations for sending emails:

  • Do not exceed 600 emails per hour
  • Emails should not contain large attachments
  • Emails should not contain suspicious code
  • Emails should not contain spam-like content
  • Promotional emails should contain an unsubscribe option

Once you make the suggested modifications to your mail service and email content and clear your mail queue, submit a ticket to our Technical Support team and request to have your IP unblocked.

NOTE: It is strictly forbidden to send spam messages from our servers.

To learn more, please read our Terms of Service.

Related articles on other types of suspensions and blocks:

Was this article helpful?

Still need help?

Heficed Slack Community

Get involved in Heficed Slack community. Get updates, ask questions, connect with peers.

Heficed Slack

Need support?

If you need any further help, don't hesitate to send a support request to our support team.