I am using a combination of OpenSMTPD/Dovecot/Amavisd(Clamd/Spamassassin) for a mail server.
I am seeing a lot of the following messages in the maillog: May 14 11:49:50 mail smtpd[22409]: relay: TempFail for d5b0bef3e46ade55: session=f8402c9c9b9ce396, from=<newelsk...@remingtonseeds.com>, to=<si...@lindhurst.co.uk>, rcpt=<->, source=127.0.0.1, relay=127.0.0.1 (localhost), delay=1h1s, stat=451 4.5.0 Error in processing, id=22378-01-2, delivery-notification FAILED: temporarily unable to send DSN to <newelsk...@remingtonseeds.com>: 451 4.5.0 From MTA(smtp:[127.0.0.1]:10025) during fwd-rcpt-to (No response to RCPT (<newelsk...@remingtonseeds.com>), dt: 0.000 s): id=22378-01-2 at /usr/sbin/amavisd line 13807. The only similar things I've seen online are someone having issues with Postfix and custom Java code. Telnet to that port shows the following: [root@mail conf.d]# telnet 127.0.0.1 10025 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. 220 mail.lindhurst.co.uk ESMTP OpenSMTPD ^] telnet> quit Connection closed. Regards, Danny Roberts www.thefallenphoenix.net
