In my application the initial message is a quote for a service. It can sometimes take days/weeks for someone to reply which means the user who sent the message needs to leave it in their inbox. As they can be sending 5-10 quotes per day this leads to a very congested inbox. Users would like to be able to send a quote and then delete it but still have the option for the person to reply with the full message.

If there are valid reasons to have both options then could it be possible to have this as an option to select in the settings menu?