Dan Herbon wrote:
So out of nowhere people sending email on their blackberries started getting the "5.1.0 - Unknown address error 571-'sorry, sender address has invalid format (#5.7.1 - chkuser)'" errors. I located the fix on the toaster wiki which basically says to add in SENDER_NOCHECK="1". Does adding this compromise security? What will its affects be?
In theory a user could send a message that held malicious commands in the message address but in reality qmail doesn't write messages that way and while there MAY be a security risk I have yet to see one or how to implement it.
