Re: Email address syntax check?

I wrote:

[...]

Any pointers to man pages, or even entire syntax checking code, would be
greatly appreciated!

To be a bit more specific in terms of the conditions I would like to check
and what I consider valid form input, that is: one or more comma or white
space separated valid email addresses.

What I do not need or plan to make use of are live checks that query smtp
servers for existence of addresses, as I understand such type of procedures
do not necessarily work, nor could they speed up the cgi processing.

.