when trying to send a mail out I am seeing the folowing error in the maillog
client address has been obfuscated
Apr 5 18:15:18 my.mailserver.co.uk postfix-01/smtp[10626]: 1234567: to=<[email protected]>, relay=mail3.gridhost.co.uk[95.142.156.18]:25, delay=1.4, delays=0.15/0/1/0.24, dsn=5.0.0, status=bounced (host mail3.gridhost.co.uk[95.142.156.18] said: 501 <[email protected]> ORCPT=rfc822;[email protected]: malformed address: ORCPT=rfc822;client@clie may not follow <[email protected]> (in reply to RCPT TO command))
I performed the following manunal test and was able to reproduce the error
$ telnet mail3.gridhost.co.uk 25
Trying 95.142.156.28...
Connected to mail3.gridhost.co.uk.
Escape character is '^]'.
220 mail-lb-002.london.gridhost.co.uk ESMTP ready
EHLO mydomain.co.uk
250-mail-lb-002.london.gridhost.co.uk
250-SIZE 50485760
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-AUTH PLAIN LOGIN
250 STARTTLS
MAIL FROM: [email protected]
250 2.0.0 OK
RCPT TO: <[email protected]> NOTIFY=SUCCESS,FAILURE,DELAY ORCPT=rfc822;[email protected]
501 <[email protected]> NOTIFY=SUCCESS,FAILURE,DELAY ORCPT=rfc822;[email protected]: malformed address: NOTIFY=SUCCESS,FAILURE,DELAY ORC may not follow <[email protected]>
Without the DSN response request it works ok
RCPT TO: [email protected]
250 Accepted
^]
if I try without the using postfix-2.6.6-2.el6.x86_64 on centos 6.8 any help appreciated, thanks