Occasionally, some of our customers have a need to send messages with
subject lines like this:
Subject:
=?iso-8859-1?Q?FW:_Notice/Avis_Canada's_Energy_Efficiency_Regulations_-_P?=
=?iso-8859-1?Q?re-publication_Amendment_11_---_R=E8glement_sur_l'effica?=
=?iso-8859-1?Q?cit=E9_=E9nerg=E9tique_du_Canada_-_Publication_pr=E9alable?=
=?iso-8859-1?Q?_Modification_no_11?=
As you can imagine, this is not totally uncommon in Canada.
However, our Exim configuration will not deliver this message, and it
doesn't even give a reasonable error message except that the message
failed.
I either need to fix this, or make Exim give the user a good excuse for
not working.