oh, I'm not able to change that. The command was actually from email clients (I tried web mail and anroid email client).
------------------------------------------------------------------From:James Lott <[email protected]>Time:2015 Aug 27 (Thu) 11:08To:Alan Cheng <[email protected]>Cc:misc <[email protected]>Subject:Re: OpenSMTPD 5.7.1 portable - received invalid command RCPT TO ... I believe the R conflicts with an OpenSSL command-- try 'rcpt to' rather than 'RCPT TO' On Aug 26, 2015, at 10:00 PM, Alan Cheng <[email protected]> wrote: Hello, My OpenSMTPD is having problems sending out emails. It gets a error message saying somthing like "received invalid command: "RCPT TO:<[email protected]>".Turned on debugging but still no clue. Anyone has any pointers? thanks! Here is related log: root@cactus:/usr/local/etc# tail -f /var/log/mail.log Aug 27 01:51:30 cactus smtpd[12220]: debug: smtp: new client on listener: 0x953f50 Aug 27 01:51:30 cactus smtpd[12220]: smtp-in: session e228d1ddb97126ff: connection from host 54.209.64.223.static.js.chinamobile [223.64.209.54] established Aug 27 01:51:31 cactus dovecot: imap(acheng): Connection closed in=23 out=501 Aug 27 01:51:31 cactus smtpd[12220]: debug: session_start_ssl: switching to SSL Aug 27 01:51:31 cactus smtpd[12220]: debug: pony: rsae_priv_enc Aug 27 01:51:31 cactus smtpd[12220]: smtp-in: session e228d1ddb97126ff: TLS started version=TLSv1/SSLv3 (TLSv1.2), cipher=ECDHE-RSA-AES128-GCM-SHA256, bits=128 Aug 27 01:51:31 cactus smtpd[12220]: smtp-in: session e228d1ddb97126ff: received invalid command: "RCPT TO:<[email protected]>" And here is my smtpd.conf: pki cactus.keda.io certificate "/etc/ssl/private/cactus.keda.io.crt" pki cactus.keda.io key "/etc/ssl/private/cactus.keda.io.key" listen on localhost listen on eth0 tls pki cactus.keda.io auth-optional table aliases file:/usr/local/etc/mail/aliases table secrets file:/usr/local/etc/mail/secrets accept for local alias <aliases> deliver to maildir "/var/mail/%{user.username}/" accept from any for domain keda.io alias <aliases> deliver to maildir "/var/mail/%{user.username}/" accept for any relay OS is Ubuntu 15.04 and OpenSMTPD is compiled from 5.7.1 portable release. Thanks,Alan
