Marcan

Appearance

Sender names ​

Reports identify senders only by IP address. Marcan works out the operator domain behind an IP (see Sender identity), for example amazonses.com or hostpoint.ch, and turns it into a display name with the parsedmarc reverse-DNS map that is bundled into the binary.

Names are captions only. They never change a verdict.

The senders list, each IP with its sender's name, messages, failed mail and DMARC pass rateThe senders list, each IP with its sender's name, messages, failed mail and DMARC pass rate

Your own names ​

To rename an operator, or to name your own servers, edit Settings → Sender names:

csv
crm.example.com, Our CRM
192.0.2.10, Office printer
192.0.2.0/24, Office
hostpoint.ch,

One target, name per line. The target is one of:

  • an IP address,
  • an IP range in CIDR notation,
  • an operator domain: the registrable domain of the reverse-DNS name, or of the SPF domain,
  • a host name under an operator domain: crm.example.com names that host and the hosts below it.

The most specific match wins: an IP, then the narrowest range, then the longest matching host name, then the operator domain. That way servers without reverse DNS can be named too.

  • An empty name hides the name a target would otherwise get.
  • # starts a comment.
  • Further columns are ignored, so a file in parsedmarc's format can be pasted as it is.

Before you save, the editor says what will change: names added, changed and removed. Nothing is saved while a line has an error. Changes apply immediately.