February 2021

The following changes will be rolled out in February 2021 and will be available promptly.

New features

Authenticated Received Chain (ARC) is part of the reputation check

SPF, DKIM and DMARC are important mechanisms in the fight against spam and phishing:

• SPF defines the IP addresses and names of the allowed senders for its SMTP domain.
• DKIM signs emails and thus protects them against alteration and forgery.
• DMARC determines how strictly the receiver should implement the settings made by SPF and DKIM.

Problems can always occur when emails are redirected or forwarded. This often happens, for example, with mailing lists or when applying automatic signatures or email disclaimers.

ARC stores the results of the email authentication performed by SPF, DKIM and DMARC of all servers involved. (Deliberate) modifications of the email thus no longer lead to errors. Each intermediate station that verifies an email with regard to SPF, DKIM and DMARC and adapts the header of the email accordingly also signs its own results with an ARC entry. If the email is sent to the next server via redirection or forwarding, this server must also verify all ARC information of the intermediate stations according to the RFC. This is how the so-called Chain of Custody is created.

Branding customisation is now possible in NoSpamProxy Cloud

You can now customise the colour scheme of the web portal and integrate a logo. See Branding.