Destination Mail Server — Domain Configuration

Category: Administration · e-securemail
Target Audience: System Administrators
Level: Prerequisite — must be configured during provisioning

What is the Destination Mail Server?

The destination mail server tells e-securemail where to deliver messages after they have been filtered and relayed.

In other words: e-securemail receives emails on your behalf, analyzes them, and then forwards them to your internal or hosted mail server. Without this information, e-securemail does not know where to route the messages.

Where to Configure This Field

From the e-securemail administration console, after selecting your domain (https://www.security-mail.net/domain?action=index):

• Go to Configuration > Domain Settings
• Select the relevant domain
• Fill in the Destination Mail Server field

⚠️ Must Be Configured During Domain Provisioning

This field must be completed immediately when adding the domain to the interface, before making any changes to the MX records.

If this field is empty when traffic starts arriving at e-securemail, incoming messages will not be deliverable — they will either be queued or rejected.

The correct order is always:

1. Add the domain to e-securemail
2. Configure the destination mail server ← here, before anything else
3. Configure SPF, DKIM, and DMARC
4. Modify the MX records last

Required Format

The destination server must be entered as a hostname (FQDN) or IP address, for example:

• mail.your-domain.com
• mails.optimails.com
• mails-ng.optimails.com

❌ Do not end the value with a period.

Unlike MX records entered in a DNS registrar interface (where a trailing dot may sometimes be required), this field is not a DNS zone — the period would be interpreted as part of the hostname and would cause a delivery error.