Mailman and DKIM

Stephen Rothwell sfr at
Thu Aug 11 11:07:50 AEST 2016

Hi all,

I have made Mailman work mostly with DKIM (and therefore DMARC).  The
one remaining trick is this: Mailman will "simplify" mail addresses in
Cc (and maybe From and To) headers in some circumstances - which breaks
DKIM signatures.

So, for an email address like:

	Name <address at>

if the "Name" is missing, Mailman will remove the "<" and ">".  To get
around this, you can either always put a "Name", or lease out both the
"Name" and the "<>".

Sorry for the pain, hopefully most people can fix this in their address
books etc.

And to be clear, this only matters where the originating site uses
DMARC with a strict policy (which includes

Stephen Rothwell

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