Toot

Written by Jonathan Kamens on 2025-01-21 at 02:41

Here's an interesting question for you:

Can RFC 2047 encoded text in the Subject line of an email contain encoded line break characters (i.e.,, ^J, a.k.a. 0x0A)?

I don't think they should, because the point of RFC 2047 encoding is to encode non-ASCII characters which would otherwise be legal in the Subject line, not to encode characters which would otherwise be illegal, which includes line breaks.

RFC 2047 itself doesn't give a definitive answer.

What do you think?

[#]email #MIME #SMTP #SysAdmin

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