>
>Not unless RFC821 has been superseded:
>
> 4.5.3. SIZES
>
>[...]
>
> text line
>
> The maximum total length of a text line including the
> <CRLF> is 1000 characters (but not counting the leading
> dot duplicated for transparency).
Actually RFC 821 has been pretty much superceded by RFC 2821. It's a
Proposed Standard right now. The line length limitation is still the same,
though.
>Oddly, the message format RFC (RFC822) puts no limit on line length.
RFC 822 has also been superceded by RFC 2822, a Proposed Standard. There
is no mention of line length because the message format can be used with
transport protocols other than SMTP.