Members do get confused about this message. Rather than saying that “Akismet has …” which means nothing to members, it would be better to say something like “Our automated spam algorithm flagged your post as possible spam” or something similar. Many members assume a moderator has deleted their post, and I don’t blame them for not clicking the Akismet link to find out who/what it is.
It would also be worth quoting some or all of the post for the member. Otherwise, it’s like saying—“You said something unacceptable recently, and if you say it again, you’ll be banned …” There’s a high chance they won’t know what post has been flagged, if they’ve made more than one post, and/or perhaps come back after a break.