That is an amazing idea! You are so talented its insane!! :)))

This is a much needed feature! we want this now..LOL

I think there should be three different categories of PMs: ones from those a user follows (perhaps optionally a different type of follow that allows receiving PMs but doesn't clutter up your feed with their posts), ones from those they have muted, and ones from everyone else. The interface could have different tabs for those different categories of PMs, each with their own unread message count. Default settings would be to show notifications and a message count for PMs from those the user has not muted within other views of the website outside of the private messaging interface. However, those settings could be changed by the user so that the notifications and message count outside the private messaging interface would be only for PMs from those the user has followed. If later there were to be push notifications to a mobile device for new PMs, the user could decide whether to allow all PMs that are not from muted accounts to push notify them, or only PMs from those they follow (which would be the default setting).

Do you consider the mute functionality described in your post the same as the existing mute function? Meaning it also (eventually) hides that account's posts from the user's view of the website by default, and also broadcasts that blocking intent onto the blockchain? I can see scenarios where I would want to mute users (ideally privately as an option) so that I don't normally see their private messages (unless I go out of my way to do so), but would still normally see their posts and comments in public discussion threads. The blockchain follow feature allows for specifying the type of follow (which is how mute is currently implemented as well, by the way), so perhaps that can be used to distinguish between a public mute that hides all communication by the blocked account from the user's view of the website and a public mute that only categorizes private messages sent from that muted account differently so that it doesn't show up in their typical messages views (and doesn't create notifications). There would ideally still need to be a third type of mute that isn't broadcast onto the blockchain (in order to privately mute unwanted PMs), which would all be done client-side.

Regarding indentation of your messages to distinguish them from the other user, I would like to see something a little more distinct. For example, different background colored boxes containing the message from you and from the other user, and placing your avatar on the right side.

The delete functionality concerns me. The current implementation of the end-to-end encryption used for private messaging does not support perfect forward secrecy. This means that if someone later gets access to the memo key that was active during the time the messages were sent, they can decrypt the encrypted messages stored on the blockchain. On one hand this is good, because with just a very small amount of data backed up (basically just the current memo key, and also old memo keys can be stored encrypted in the history of account JSON metadata changes on the blockchain), the user can retrieve the entire history of their private conversations that they wish to keep. On the other hand, it means a user can't really delete a specific private conversation unless they somehow truly destroy the appropriate memo keys, and even then it comes at the cost of losing access to all the other old conversations that they actually want to keep.

In my opinion, Steem's private messaging system should prioritize the ease of backup over perfect forward secrecy. There are already other chat applications like Signal that design their cryptography to provide privacy-centric features like perfect forward secrecy and also plausible deniability. (Side note: Steem's private messaging also doesn't provide plausible deniability because the ciphertext is included in a transaction that needs to be signed by the author's posting key. This means someone can expose a PM they received to the public in a way that can be cryptographically verified to be legitimate.) Of course this means that a  "delete" function would likely provide users with a false sense of security, which is something I am very much against. So at most I would like to see an archive function (to avoid clutter of old conversations in the default messages view) rather than a "delete" function.

Looking forward to the application of it. Be far more user friendly for sure and easier to attempt to contact someone without needing to use other sites. Be a great addition

It's happening!!!

The design suggestions for the PM functionality look good. It should be off the record erm... the blockchain, so the Delete functionality here should be useful addition... finally be able to delete something properly on steemit.

And maybe, just maybe we are also going to get another tab besides Messaged, what about Mentions with a quick list of posts where your username was mentioned :)

Poor @blueorgy, always losing the lottery...

Little Bird :-) btw, good design work, Blue. Can't wait to see mobile UI concept you have in mind for Steem Mobile.. 
Anyone knows or has any idea if it is already available on Steem core so that one can start implementing or start including in mobile app?

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I like it, but I'd also like to see a feature which Facebook uses which, by default, hides messages from people you do not follow. This, to me, is important. Sure, I can mute people, but as the platform grows, I'll have to spend all my time muting and that's a waste. I'd like to see followed messages given much more priority over random spam. Also, maybe a way to filter out links, like Twitter did with their DMs early on. If you tried to send a link, it failed.

I think spam is going to be more and more of a problem as the platform grows, so I hope we learn and improve on the lessons the other big social media platforms have already learned.

What are the main benefits to DMs? I don't see this as a high priority, though I could be missing something.

I'd like to see a messaging alert (audible even?) when someone I'm following posts a new story.  Great prototype! you put a lot of work into this feature.

This will be a great way to spam more ...sweet!! can't wait :)

I was try to suggest something the same, but with worse graphics illustration :)
And my post don't have high attention.

I hope you will be more lucky

Yaeh, easiest way to spam @dantheman)