"We thought you might like to know that we put [HN link] in the second-chance pool, so it will get a random placement on the front page sometime in the next 24 hours."
Another I got a few times in 2015 starts:
"[link] looks good, but didn't get much attention. Would you care to repost it? You can do so here: [link]."
Former might be a newer version of the latter, going by email dates.