I\'m building a public website which has its own domain name with pop/smtp mail services. I\'m considering giving users the option to update their data via email - something sim
use a dotnet popclient to read the incoming emails, parse them for whatever you are expecting and insert the data into the database.
see codeproject website for simple popclient implementation
you would have to decided on the email content yourself, eg data only, payload of sql statements, etc