> I am using Squirrel Mail 1.4.9a on a Suse Linux Enterprise Server 10. > We have the annoying problem that Squirrel Mail "read receipts" are > always treated as spam. > > The reason is simple: > MailScanner & Spamassassin say: "No sender or watermark detected" > > If I am interpreting the headers correctly then the watermark header > is the "MailScanner-NULL-Check" header, but how can I teach squirrel > to fetch and send that header if mentioned in an email? SpamAssassin 3.2.4 and MailScanner 4.69.9-3 can't say "No sender or watermark detected". They don't have such strings. You can't teach SquirrelMail to set watermark header, because such header might allow to manipulate mailscanner scores. Any sane software will ignore such watermarks in incoming email. You have to find why this error is triggered. It is not watermark. Maybe SquirrelMail fails to set some headers required in DSN or MailScanner does not like null sender which is required in DSNs. Please note that you are talking about error message of third party software here. You should say exact error message or people will be unable to find information about it. Only MailScanner people might notice that you are confusing "No sender or watermark detected" with "no watermark or sender address" or some other error message. Only they can tell what tests are executed by MailScanner and why they fail. -- Tomas ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ ----- squirrelmail-users mailing list Posting guidelines: http://squirrelmail.org/postingguidelines List address: squirrelmail-users@xxxxxxxxxxxxxxxxxxxxx List archives: http://news.gmane.org/gmane.mail.squirrelmail.user List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users
