Hi there, On Mon, 25 Sep 2023, jd--- via Users wrote: > On Sun, 2023-09-24 at 15:46 +0100, G.W. Haywood via Users wrote >> >> We use a milter to write everything to a Postgres database, and in >> the process that does a lot of deduplication. > > Would you mind sharing your code, please? What's your MTA? -- 73, Ged.