Mail::RFC822::Address - Perl extension for validating email addresses according to RFC822

       Paul Warren, pdw@ex-parrot.com

       This program is copyright 2001-2002 by Paul Warren.

       Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
       associated documentation files (the "Software"), to deal in the Software without restriction, including
       without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
       following conditions: The above copyright notice and this permission notice shall be included in all
       copies or substantial portions of the Software.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
       LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
       EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
       CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
       DEALINGS IN THE SOFTWARE.

       Most of the test suite in test.pl is taken from RFC::RFC822::Address, written by Abigail,
       abigail@foad.org

       Mail::RFC822::Address validates email addresses against the grammar described in RFC 822 using regular
       expressions.  How to validate a user supplied email address is a FAQ (see perlfaq9): the only sure way to
       see if a supplied email address is genuine is to send an email to it and see if the user recieves it.
       The one useful check that can be performed on an address is to check that the email address is
       syntactically valid.  That is what this module does.

       This module is functionally equivalent to RFC::RFC822::Address, but uses regular expressions rather than
       the Parse::RecDescent parser.  This means that startup time is greatly reduced making it suitable for use
       in transient scripts such as CGI scripts.

   valid(address)
       Returns true or false to indicate if address is an RFC822 valid address.

   validlist(addresslist)
       In scalar context, returns true if the parameter is an RFC822 valid list of addresses.

       In list context, returns an empty list on failure (an invalid address was found); otherwise a list whose
       first element is the number of addresses found and whose remaining elements are the addresses.  This is
       needed to disambiguate failure (invalid) from success with no addresses found, because an empty string is
       a valid list.

       Mail::RFC822::Address - Perl extension for validating email addresses according to RFC822

       RFC::RFC822::Address, Mail::Address

perl v5.36.0                                       2022-10-13                                       Address(3pm)

         use Mail::RFC822::Address qw(valid validlist);

         if (valid("pdw@ex-parrot.com")) {
             print "That's a valid address\n";
         }

         if (validlist("pdw@ex-parrot.com, other@elsewhere.com")) {
             print "That's a valid list of addresses\n";
         }