We wanted to give a bit more insight into the Warning from our SMTP Diagnostic tool about ‘Reverse DNS does not match SMTP Banner’. The short answer is that the reverse IP address name is not contained in the server HELO or EHLO banner. In the example below, the string “someotherdomain.com” is not found anywhere [...]
What does the Warning – Reverse DNS does not match SMTP Banner mean? – SMTP Diagnostic Tool
March 22, 2010 By
Web Security Breaches Rock Hotmail Users
March 19, 2010 By
Users of Microsoft’s free email service Hotmail are reeling this week after a huge web security breach last month. All Hotmail users are encouraged to change their passwords and be vigilant as an increase in spam activity on the site has led to web security breaches. Individual accounts have been hacked in recent weeks, and [...]
Google Announces New Message Log Search for Google Apps Premier and Postini
February 16, 2010 By
Google announced a few months ago that they would be releasing a new function for searching Message Logs. Last week it was officially released and has been widely accepeted by all system administrators. The Message Log Search is available for Google Apps Premier and Postini administrators on Systems 5, 6, 7, 8, 9 and 200. [...]
Reverse DNS FAILED! This is a problem.
December 4, 2009 By
When a sending server makes a connection to the recipient server, the recipient server notes the sending IP address and performs a reverse lookup. This is done by sending a DNS query which returns a Fully Qualified Domain Name ( FQDN) registered for that IP address. If the sending SMTP address matches the domain, then [...]
CSMA Blacklist – Website Down
December 2, 2009 By
UPDATE 12/3/2010: It appears that the CSMA Blacklist is officially going offline. They have updated their website with these details: Notice: Due to name server configuration issue, DNS traffic was temporarily rerouted to a server that provided improper results. The problem was resolved, however some lookups may return incorrect information for the next several hours. [...]