On Sat, 4 Oct 2014, lee wrote: > From: lee <[email protected]> > To: [email protected] > Date: Sat, 4 Oct 2014 15:51:33 > Subject: Re: [exim] how to check a message header for being empty > > Jeremy Harris <[email protected]> writes:
... > Is the Subject: header required by some RFC? If it is, I'll also > deny messages that don't have one. Not as far as I'm aware. RFC5322, "Internet Message Format", contains: The only required header fields are the origination date field and the originator address field(s). All other header fields are syntactically optional. More information is contained in the table following this definition. in Section 3.6. Field Definitions And there's probably still email clients that will omit at least one of the above :-( -- Dennis Davis <[email protected]> -- ## 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/
