If you receive mail from a member but would prefer not to reply, there is a Create 'no thanks' message button. This generates a polite message addressed to the sender (which you may edit if you wish), thanking them for their message but declining further contact.
If you'd like to stop receiving messages from a particular member, you can block them using the Block link on their profile. If you do receive mail which you find inappropriate in any way, use the Report this message link on the relevant message.
If the same member is blocked multiple times, they may have their membership suspended.
Please don't block other members routinely or excessively. Blocking should be used to stop others contacting you. If you don't wish to see someone in your searches, please use the Hide from searches option.