Email::Valid(3) User Contributed Perl Documentation Email::Valid(3)


   Email::Valid - Check validity of Internet email addresses
   perldoc Mail::Address

   yum install perl-Email-Valid  --enablerepo=epel
     use Email::Valid;
     print (Email::Valid->address('') ? 'yes' : 'no');
   This module determines whether an email address is well-formed, and
   optionally, whether a mail host exists for the domain.

   Please note that there is no way to determine whether an address is
   deliverable without attempting delivery (for details, see perlfaq 9).
   This module requires perl 5.004 or later and the Mail::Address module.
   Either the Net::DNS module or the nslookup utility is required for DNS
   checks.  The Net::Domain::TLD module is required to check the validity
   of top level domains.
     Every method which accepts an <ADDRESS> parameter may
     be passed either a string or an instance of the Mail::Address
     class.  All errors raise an exception.

new ( [PARAMS] )

       This method is used to construct an Email::Valid object.  It
       accepts an optional list of named parameters to control the
       behavior of the object at instantiation.

       The following named parameters are allowed.  See the individual
       methods below of details.



       This method accepts an email address or domain name and determines
       whether a DNS record (A or MX) exists for it.

       The method returns true if a record is found and undef if not.

       Either the Net::DNS module or the nslookup utility is required for
       DNS checks.  Using Net::DNS is the preferred method since error
       handling is improved.  If Net::DNS is available, you can modify the
       behavior of the resolver (e.g. change the default tcp_timeout
       value) by manipulating the global Net::DNS::Resolver instance
       stored in $Email::Valid::Resolver.

tld ( <ADDRESS> )

       This method determines whether the domain part of an address is in
       a recognized top-level domain.

rfc822 ( <ADDRESS> )

       This method determines whether an address conforms to the RFC822
       specification (except for nested comments).  It returns true if it
       conforms and undef if not.

fudge ( <TRUE>|<FALSE> )

       Specifies whether calls to address() should attempt to correct
       common addressing errors.  Currently, this results in the removal
       of spaces in AOL addresses, and the conversion of commas to periods
       in Compuserve addresses.  The default is false.

fqdn ( <TRUE>|<FALSE> )

       Species whether addresses passed to address() must contain a fully
       qualified domain name (FQDN).  The default is true.

local_rules ( <TRUE>|<FALSE> )

       Specifies whether addresses passed to address() should be tested
       for domain specific restrictions.  Currently, this is limited to
       certain AOL restrictions that I’m aware of.  The default is false.

mxcheck ( <TRUE>|<FALSE> )

       Specifies whether addresses passed to address() should be checked
       for a valid DNS entry.  The default is false.

tldcheck ( <TRUE>|<FALSE> )

       Specifies whether addresses passed to address() should be checked
       for a valid top level domains.  The default is false.

address ( <ADDRESS> )

       This is the primary method which determines whether an email
       address is valid.  It’s behavior is modified by the values of
       mxcheck(), tldcheck(), local_rules(), fqdn(), and fudge().  If the
       address passes all checks, the (possibly modified) address is
       returned as a string.  Otherwise, the undefined value is returned.
       In a list context, the method also returns an instance of the
       Mail::Address class representing the email address.

details ()

       If the last call to address() returned undef, you can call this
       method to determine why it failed.  Possible values are:


       If the class is not instantiated, you can get the same information
       from the global $Email::Valid::Details.
   Let’s see if the address ’’ conforms to the RFC822

     print (Email::Valid->address('') ? 'yes' : 'no');

   Additionally, let’s make sure there’s a mail host for it:

     print (Email::Valid->address( -address => '',
                                   -mxcheck => 1 ) ? 'yes' : 'no');

   Let’s see an example of how the address may be modified:

     $addr = Email::Valid->address('Alfred Neuman <Neuman @>');
     print "$addr\n"; # prints

   Now let’s add the check for top level domains:

     $addr = Email::Valid->address( -address => '',
                                    -tldcheck => 1 );
     print "$addr\n"; # doesn't print anything

   Need to determine why an address failed?

     unless(Email::Valid->address('maurice@hevanet')) {
       print "address failed $Email::Valid::Details check.\n";

   If an error is encountered, an exception is raised.  This is really
   only possible when performing DNS queries.  Trap any exceptions by
   wrapping the call in an eval block:

     eval {
       $addr = Email::Valid->address( -address => '',
                                      -mxcheck => 1 );
     warn "an error was encountered: $@" if $@;
   Email::Valid should work with Perl for Win32.  In my experience,
   however, Net::DNS queries seem to take an extremely long time when a
   record cannot be found.
   Copyright 1998-2003, Maurice Aubrey <>.  All rights

   This module is free software; you may redistribute it and/or modify it
   under the same terms as Perl itself.
   Significant portions of this module are based on the ckaddr program
   written by Tom Christiansen and the RFC822 address pattern developed by
   Jeffrey Friedl.  Neither were involved in the construction of this
   module; all errors are mine.

   Thanks very much to the following people for their suggestions and bug

     Otis Gospodnetic <>
     Kim Ryan <>
     Pete Ehlke <>
     Lupe Christoph
     David Birnbaum
     Elizabeth Mattijsen (
   Mail::Address, Net::DNS, Net::Domain::TLD, perlfaq9

perl v5.10.1 2010-06-10 Email::Valid(3)