Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
The following recipient(s) could not be reached: firstname.lastname@example.org on 5/1/2009 11:15 AM You do not have permission to send to this recipient. For assistance, contact your system administrator. <subdomain.domain.local #5.7.1 smtp;554 5.7.1 <adsl-1-1-1-1.dsl.lsan03.pacbell.net[220.127.116.11]>: Client host rejected: Please_use_SMTP_relay_of_your_isp,_or_setup_non-generic_dns.See:_http://www.craigslist.org/about/help/generic_DNS xabd-276>