SHORT DESCRIPTION This Perl module provides routines for checking validness of email address. It makes several checks: 1) it checks syntax of email address; 2) it checks if there any MX record for specified in email domain or if there exist such host; 3) it tries to connect to email server directly via SMTP to check with command VRFY if user is valid. This module was designed with CGIs in mind. It has support for check timeout so it can be used to filter faslty wrong e-mail adresses in CGI forms (passing as valid e-mail addresses that can't be checked fastly). For details see pod documentation in Mail::CheckUser REQUIREMENTS This module requires next Perl modules: 1) Net::SMTP (libnet package) 2) Net::DNS (Net-DNS package) 3) IO::Handle (IO package) Perl distributions before 5.6 contain version of IO::Handle which has bugs in timeouts handling. Download latest version from CPAN if you haven't did it before. INSTALLATION perl Makefile.PL make make test make install Tests can run very slowly especially if you have network down. BUGS If you have encountered any problems with this module fill free to contact me. My email: Ilya Martynov