I’m wondering if any of you interworx folk get this error when sending email.
Konto: ‘firstname.lastname@example.org’, Server: ‘mail.domainname.com’, Protokoll: SMTP, Serverantwort: ‘421 unable to read controls (#4.3.0)’, Port: 25, Secure (SSL): Nein, Serverfehler: 421, Fehlernummer: 0x800CCC67
(I know its in german but you can still get the error)
Information I have found on the net:
qmail-smtpd-auth-0.31 has a minor bug if you use morercpthosts. After a failed authentication attempt, if the client attempts to send mail to a domain which is not listed in rcpthosts, qmail-smtpd is unable to read morercpthosts.cdb. Instead, it sends “421 unable to read controls (#4.3.0)” and drops the connection. qmail-smtpd-auth-close3.patch fixes this bug by closing file descriptor 3 (only if necessary) in the authentication child process rather than the parent process.
Any ideas if this is the case? I have the latest version of interworx running on my server.