E-mail immediately rejected by server - channel empty

Hello

I have Sun Java System Communications Express 6 installed on a RedHat machine. I am facing a problem with a specific e-mail address.

When I try to send e-mail to this address, server is immediately rejected the demand and in the mail_log, I noticed that the input of the slave channel is empty.

This is the output I see in the log file:

grep < email_add > mail.log_yesterday

21 January 2016 12:48:30.30 tcp_intranet J 0 < sender > rfc822; < email_add > 550 5.1.2 unknown host or domain: < email_add >

21 January 2016 13:31:40.61 tcp_intranet J 0 < sender > rfc822; < email_add > 550 5.1.2 unknown host or domain: < email_add >

21 January 2016 13:32:36.85 tcp_intranet J 0 < sender > rfc822; < fake_email_add > 550 5.1.2 unknown host or domain: < email_add >

21 January 2016 13:54:04.31 tcp_intranet J 0 < sender > rfc822; < fake_email_add > 550 5.1.2 unknown host or domain: < email_add >

The e-mail address that I am trying to send e-mail is displayed as "< email_add >". I also tried to send an email to a non-existent address '< fake_email_add >' and the server has the same.

However, I know the address I am trying to send email exists because I can see that users can receive e-mail from the user above.

Also, I tried to do a nslookup on the server to see if there is a problem with the resolution of the field of recipients, but appears not to be the case, as you can see below:

Nslookup

> set type = MX

> < email_add_domain >

Server: xx.xxx.xxx.xxx

Address: xx.xxx.xxx.xxx #53

Non-authoritative answer:

Server < email_add_domain > = 10 < email_add_domain_mailserver >.

Server < email_add_domain > = 10 < email_add_domain_mailserver >.

Server < email_add_domain > = 10 < email_add_domain_mailserver2 >.

The responses by authorities of:

< email_add_domain > nameserver is < email_add_domain_nameserver >.

< email_add_domain > nameserver is < email_add_domain_nameserver2 >.

internet address < email_add_domain_nameserver > = xxx.xxx.xx.xx

internet address < email_add_domain_nameserver2 > = xxx.xxx.xxx.xx

Please advice.

Thank you.

This is useful. . Events is a relatively new TLD - registered in 2014. This makes me suspect that you have not configured a system update your IANA tlds.txt file:

http://data.IANA.org/TLD/TLDs-Alpha-by-domain.txt

on a regular basis. Or alternatively, that you have not changed the usual "." set in your imta.cnf so it does not perform a validity check on the TLD, changing:

.           $U % $H$, $H@tcp_local-daemon

TO:

.           $U % $H@tcp_local-daemon

that will eliminate the TLD registration.

It is also possible to have an older configuration that includes a file internet.rules for this sort of thing. If so, your options are to change to update the contents of this file manually (not recommended), switch to the use of tlds.txt if the version of the mail server (7.0.5 or later) supports, or switch your "." rule to one as I show above.

Tags: Fusion Middleware

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