451 error problem

[upsforum]

I have an account maked with a sub domain name on my vps, the subdomain is landing.maindomain.com, maindomain.com is active on another server (that I don't can .

I configured email account [email protected] on my vps and I send messages with phpmailer but exim return 451 error:

this is the log


LOG: MAIN
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1V48hu-0002zm-EY
delivering 1V48hu-0002zm-EY
Connecting to mailx.insigno.net [151.12.107.22]:25 from 79.143.187.230 ... connected
SMTP<< 220 mailx.insigno.net ESMTP Exim 4.69 Thu, 01 Aug 2013 10:38:29 +0200
SMTP>> EHLO vps5.myhostname.net
SMTP<< 250-mailx.insigno.net Hello vps5.myhostname.net [79.143.187.230]
250-SIZE 52428800
250-PIPELINING
250 HELP
SMTP>> MAIL FROM:<[email protected]> SIZE=2637
SMTP>> RCPT TO:<management @ -----. com>
SMTP>> DATA
SMTP<< 250 OK
SMTP<< 451 Temporary local problem - please try later
LOG: MAIN
SMTP error from remote mail server after RCPT TO:<management@ -----. com>: host mailx.insigno.net [151.12.107.22]: 451 Temporary local problem - please try later
SMTP<< 503-All RCPT commands were rejected with this error:
503-Temporary local problem - please try later
503 Valid RCPT command must precede DATA
SMTP>> QUIT
LOG: MAIN
== management@ -----. com R=lookuphost T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<management@ -----. com>: host mailx.insigno.net [151.12.107.22]: 451 Temporary local problem - please try later

 

[cPanelMichael]

Hello

Are you able to send to other remote mail servers from this PHP application? Or, is this issue occurring no matter what email address you send out to? Have you confirmed the subdomain is not added to the /etc/localdomains file on the remote mail server? Is it only happening when you use the PHP script to send out email, or does the issue occur when using an email client or Webmail?

Thank you.

 

[upsforum]

I use php application for send to 3 address email, two address work but the 3rd address not work, this address is active where is located maindomain.com account,

summarize:

my vps cpanel with [email protected] (on landing.maindomain.com account) sent to 3 addresses:

1) remote mail 1 [OK]
2) remote mail 2 [OK]
3) remote mail with maindomain.com account [NOT WORK] (this server not use cpanel, and i don't know that OS and smtp use)

DNS of maildomain.com is configured with a record A of landing.maindomain.com to ip of my vps cpanel and without mx record

 

[cPanelMichael]

Check to see if the domain name associated with your subdomain is located in the following file on your system:

/etc/localdomains

It should not exist in this file if it's email is hosted on a remote mail server. Also, do you get the same result when sending with an email client or with Webmail?

Note the error message indicates that SMTP authentication is not enabled. Please ensure your PHP application is authenticating before attempting to send email via SMTP.

Thank you.

 

[upsforum]

I think that the problem is that server smtp of @maindomain.com not is available, is possible? because my customer confirm this on this domainname smtp is inactive.

But I can disable smtp recipient verification on my vps?

 

[upsforum]

I don't understand, I added replyto to phpmailer and now work fine

 

[cPanelMichael]

It's possible the remote mail server required a "REPLYTO" entry in the header in order to accept the delivery.

Thank you.