On 16 Apr 2019, at 5:18, Graeme Fowler via Exim-users wrote:
HOWEVER: I don’t think this is advisable, as you could break DKIM signing if the over-long header is included in the signature.
Because header folding is a permissible in-flight message modification per RFC822 & its successors, the DKIM 'relaxed' header canonicalization (which is almost universally used) protects signatures from breakage by folding.
-- Bill Cole [email protected] or [email protected] (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Available For Hire: https://linkedin.com/in/billcole -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
