Hello, I have a message in queue for about 24 hours and checking the delivery log I found this.
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: exim -v -M 1INUw5-0007VU-DZ
Connecting to mx.uol.xxx.br [xxx.xxx.com.br]:25 ... connected
SMTP<< 220 starfury20.xxx.com.br ESMTP
SMTP>> EHLO svr01.xx***********
SMTP>> MAIL FROM: SIZE=3111
SMTP>> RCPT TO:
SMTP<< 250 Ok
SMTP<< 450 Client host rejected: cannot find your hostname, [220.127.116.11]
SMTP<< 554 Error: no valid recipients
I have checked dnsreport for this domain and found this
WARNING: One or more of your mailservers is claiming to be a host other than what it really is (the SMTP greeting should be a 3-digit code, followed by a space or a dash, then the host name). If your mailserver sends out E-mail using this domain in its EHLO or HELO, your E-mail might get blocked by anti-spam software. This is also a technical violation of RFC821 4.3 (and RFC2821 4.3.1). Note that the hostname given in the SMTP greeting should have an A record pointing back to the same server. Note that this one test may use a cached DNS record.
***********.co claims to be host svr01.xx*********** [but that host is at 74.xx.xx.2 (may be cached), not 74.xx.xxx.13]. <br />
What should i do to correct this error? btw, I host about 100 sites on this server.