On 8/19/19 1:45 PM, Marc Goldman via mailop wrote:
Hi Folks,
Hi,
We are rebuilding our entire mailing platform from the ground up and trying to do everything according to RFCs (or as close as possible).We are running into an issue where header length is concerned: https://www.ietf.org/rfc/rfc2822.txt 2822 states that:
Check the current Internet Message Format RFC, 5322.
There are two limits that this standard places on the number of characters in a line. Each line of characters MUST be no more than 998 characters, and SHOULD be no more than 78 characters, excluding the CRLF.This length tends to break and wrap certain lines (ie - list-unsubscribe) and I have not seen others header look the same.
I've seen a LOT of Received: headers wrapped.
Does anyone follow this line length strictly? Is there anything wrong with ignoring it?
My understanding is that this is the length of the line, as in sequence of ASCII bytes, which is NOT the same thing as the length of the header. The header can easily be wrapped and take up multiple lines of text. I'm not sure if there is an upper bound on the length of a line wrapped header. (Please correct me if I'm wrong.)
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