> Section 3.4. Address Specification of RFC2822 specifies
> name-addr = [display-name] angle-addr
> What are the length limits on the display-name field? I take it a long
> display-name
> value would simply be folded as described under 2.2.3. Long Header Fields
AFAICT the relevant specifications impose no limits on the size of the
display-name. What implementations actually do is another matter, of course. I
believe I've encountered limits as low as 64 octets. I certainly wouldn't
recommend putting in stuff longer than 100 or so octets and expect it to pass
through everything intact.
> Are there practical length limits with respect to current SMTP clients
> and servers?
Given that there are clients which don't show users the display-name at all, I
suppose the practical length limit could be seen as zero. Those clients that do
display this information often allocated a fairly narrow field to it, so I
wouldn't count on anything more than 30-40 characters (not octets) being
visible.
Ned
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