Email Inbound

With DynAccess, you can operate your own email server independently of any provider – with professional features for secure operation on a dynamic IP.

Email Features Overview

	direct email delivery to your in-house server
	backup mail exchanger for fail-safe operation
	email forwarding to external address
	Hidden MX – your server remains invisible
	virus and spam blocking
	SMTP relay – send emails with any sender address

Direct Email Delivery

Starting from the Private B plan, you can receive emails directly on your in-house email server (e.g. Exchange, Kerio, Tobit David). Instead of retrieving emails via POP3, you operate your own SMTP server with direct MX routing.

The advantage: Your emails reach you without detours through another provider. With your own domain (e.g. your-company.com), emails to employee@your-company.com are delivered directly to your server.

Important: For secure operation in a business environment, we recommend the HeartBeat plans. Only this ensures that no emails are delivered to the wrong recipient in case of a connection failure.

Backup Mail Exchanger

A backup MX is essential for any serious email solution. Starting from the Business A plan, you can configure your own backup MX. From Business C onwards, we provide our backup mail exchangers for your use.

How it works

If your email server fails, our backup mail exchangers store your emails for up to 5 days. As soon as you are back online, the emails are automatically delivered. The maximum email size is 15 MB, the number of emails is unlimited.

Recommendation: For commercial operation of an in-house email server, we recommend at least the HeartBeat A plan. Only this way we neutralize your account within seconds in case of disruptions and the backup MX works reliably.

Email Forwarding

With the HeartBeat plans, you can have emails forwarded to an email address stored with us – even without your own SMTP server.

Use Cases

Configuration is done via myaccount.dynaccess.de.

Hidden MX

Starting from the HeartBeat B plan, you can use the Hidden MX feature. Your server is not published in DNS – only our backup mail exchangers appear to the outside world.

Advantages:

	Your mail server remains "invisible"
	All emails automatically pass through virus and spam filters
	Protection against direct attacks on your server

Virus and Spam Blocking

Every email that passes through our backup mail servers is checked for viruses and spam.

When does the filter apply?

The filters apply automatically when emails are routed through our backup MX servers:

	When Hidden MX is enabled
	When using email forwarding
	When your firewall blocks certain IPs and the sender falls back to our backup MX

Note: For blocked emails, the sender receives an error message. You do not receive a list of blocked emails.

Feature Availability by Plan

Conclusion

With DynAccess, you operate an in-house email server on a dynamic IP securely and professionally. The combination of HeartBeat, backup MX and optional Hidden MX provides maximum reliability and protection against spam and viruses.