Here are 2 more modmail messages with the .spam class that I could find in the past 2 months:

• https://mod.reddit.com/mail/perma/rtgky https://www.reddit.com/message/messages/15fvi8c
• https://mod.reddit.com/mail/perma/pax7l https://www.reddit.com/message/messages/12r3ode

One indeed did contain a link to the same site as the first, but the other is just one of our standard canned replies that contains no links at all.

Both of those users messaged the mods several times about the same thing, and I guess I now know why; they were presumably never actually getting our replies.. It is quite worrying that modmail replies sent by mods can be dropped without any indication in the UI (this isn't visible in New Modmail at all, so would go completely undetected unless a mod happened to open the PM link). Is this happening to regular PMs or chats as well? I have had soo many times someone I've been messaging just abruptly stopped replying, and now I wonder if any of them is also wondering why I stopped messaging them..

I don't know for certain if there's a 1:1 relationship between the .spam class and messages not showing up; I definitely do remember seeing this in legacy modmail messages before, but users still replied despite appearance of red-highlighted messages (or maybe it was the users' messages themselves I was seeing in red, I don't recall for sure), so I never gave it much thought before.

I can't actually find the others from before those 2, because every single message I sent from before 2 months ago was spammed when I was banned for an hour for unknown reasons (unrelated, but is there any chance of ever getting all my prior content restored? I can't even link people to older posts of mine, as every single one of them is still gone).

How are we supposed to resolve user concerns and hold conversations if we can't even be sure our messages are getting thru?

Ours are far from the only communities that use that site as a verification method (to prevent scams and spam); are the others, notably r/Sexsells, aware of this? And what other common sites should we avoid allowing for this?

More importantly, is there a way we can know our messages are being blocked by the spam filter? Can the New Modmail interface at least be updated to indicate when a message was blocked? The warning message suggests the old PM view will go away eventually, and if that happens, there will be no way to discover that a message was not sent, which seems like a problem.. Or do we just have to accept that modmails shouldn't contain any links?

Well, nobody ever told us, and the UI gives no indication that anything is amiss. Is it really too much to ask for an indication of when a modmail reply has been spam-filtered? How can we know this if there's no public list of banned domains, and no indication when we try to send a link to a banned domain? Surely revealing the existence of this filtering at least to mods responding to their own users in their own communities can't pose much a threat of breaking spam filtering. Legacy Modmail at least hilighted them red.