0: #!/usr/bin/perl
1: 
2: # By Sean Murphy
3: # E-Mail Syntax Checker
4: #
5: # This is a simple script that will
6: # check the syntax of an email address
7: # and spit back whether the address is
8: # syntactically correct or not. This
9: # is my first post to the Craft node.
10: 
11: #mmmm...marshmallowey goodness...
12: $atom = '[^()<>@,;:\".\[\] \000-\037\177]+';
13: $quoted = '"(?:[^"\\\n]|\\.)*"';
14: $word = "(?:$atom|$quoted)";
15: $localpart = "$word(?:\.$word)*";
16: $subdomain = "(?:$atom|\\[(?:[^\\[\\]\\\\\\r]|\\.)*\\])";
17: $domain = "$subdomain(?:\.$subdomain)*";
18: $addrspec = "$localpart\@$domain";
19: $route = "(?:\@$domain)+:";
20: $routeaddr = "<$route?$addrspec>";
21: $mailbox = "(?:$addrspec|$word+$routeaddr)";
22: $group = "$word+:(?:$mailbox(?:,+$mailbox)*)?;";
23: $address = "$mailbox|$group";
24: 
25: sub addr {
26: local($_) = @_;
27: 1 while s/\((?:[^()]|\\[()])*?[^\\]\)/ /g;
28: /$address/o;
29: }
30: 
31: if (@ARGV > 0) {
32: foreach (@ARGV) { print "$_ is ", addr($_) ? "" : "not ", "valid\n"; }
33: } else {
34: while (<>) { chop; print "$_ is ", addr($_) ? "" : "not ", "valid\n"; }
35: }