TwtMailer is a free service which provides you with an email whenever someone replies (@replies) to you in Twitter. All you need is to signup for an account using your twitter username & password, provide an email to send the messages to. When the service check twitter & find you have new @reply messages, then it is emailed to you telling you this and even list the twitter posts for you to read yourself.
TwtMailer mentions that the email and Twitter credentials are stored in encrypted format for safety. This service can be useful to track all the replies you get and to make sure you do not miss any.
At the same time, this service can also be annoying if you get too many replies in your Twitter account, the emails will also be more. There is no mention on when the emails would be sent and also no option to configure the email time for notifications.
if you click the about / contact tab in the top right hand corner you will see it explains the timescale (checking every 15 minutes) – if we get emails requesting longer checking gaps we can increase to 30 / 45 / 60 minutes…
there have been many features added to the site now including the ability to change the frequency of when the system checks for updates, also accounts can now check for direct messages too.
more & more features being added all the time.