https://community.plus.net/t5/Email/Plusnet-silently-drops-some-emails/m-p/2037019#M57881 <P>In the current ultra leaky spam filter the "spam flag" in the email header / message source is :&nbsp; <BR /><BR />X-Spam: Yes<BR /><BR /></P> Sun, 08 Feb 2026 19:03:35 GMT PhilipHeyes 2026-02-08T19:03:35Z https://community.plus.net/t5/Email/Plusnet-silently-drops-some-emails/m-p/2037013#M57876 Plusnet’s spam engine (Cloudmark + PN MXCore)<BR /><BR />This is where the nonsense happens.<BR /><BR />Cloudmark score:<BR />`<BR />X-CM-Score: 0.00<BR />`<BR />Cloudmark says: not spam.<BR /><BR />SpamAssassin composite score:<BR />`<BR />X-Spamd-Result: default: False [-4.15 / 4.00]<BR />`<BR />A score of -4.15 is extremely hammy. <BR />Again: not spam.<BR /><BR />And yet Plusnet adds:<BR />`<BR />X-pn-pstn-db:" Spam 99<BR />`<BR /><BR />This is a Plusnet‑specific internal flag, not based on industry-standard scoring. <BR />It is known to be unreliable and often misfires Sun, 08 Feb 2026 18:02:37 GMT https://community.plus.net/t5/Email/Plusnet-silently-drops-some-emails/m-p/2037013#M57876 jkg 2026-02-08T18:02:37Z https://community.plus.net/t5/Email/Plusnet-silently-drops-some-emails/m-p/2037019#M57881 <P>In the current ultra leaky spam filter the "spam flag" in the email header / message source is :&nbsp; <BR /><BR />X-Spam: Yes<BR /><BR /></P> Sun, 08 Feb 2026 19:03:35 GMT https://community.plus.net/t5/Email/Plusnet-silently-drops-some-emails/m-p/2037019#M57881 PhilipHeyes 2026-02-08T19:03:35Z