One of our email recipients has 17 mx records, and our emailing program postfix on linux does not retrieve these records. When using dig, the same thing happens.
This command returns no mx records
But when using +trace, the records get returned
The question is whether there is a setting we can make to make the standard mx lookup work properly.
Can I use two different DNS servers in the one command in the form of primary and secondary.
Take this for example:
dig @<primaryAddress> @<secondaryAddress> MX domain.tld
So if primary address is down, it will use the secondary address as a backup. It seems to work when testing, but thought... (1 Reply)
Hi All,
Can please let me know what is the difference between the single line mode and multi line mode in regular expresions?
Thanks,
Chidhambaram B (3 Replies)
Hi,
I have these entries in the /etc/esolv.conf:
------------
domain xxxxxx
search yyyyyy
nameserver 127.0.0.1
nameserver aaaaaaaaaaaaaaaa
nameserver bbbbbbbbbbbbbbbb
-------------
When I use 'dig' or 'nslookup' command, like 'dig yahoo.com' it uses the localhost as the server.
I... (2 Replies)
I am relatively new to this forum and Unix scripting.
ksh script:
part 1 :will call a PL\SQL program will create 3 CSV file at the unix directory.
part 2 : will sftp the files to the EFT server.
Once the EFT server receives these file , it will transfer them to a shared windows folders.
... (3 Replies)
Dear All,
I want to get all the IPs of the A RECORDS for mail.google.com.
The aim is to deny access to these IPs.
I learnt that mail.google.com has several IPs.
I did the following steps:
1. whois google.com
2. I got the following as its DOMAIN SERVERS:
3.# dig @ns1.google.com a... (1 Reply)
Hey everyone,
Okay, so I've been having some fun with the dig command, and wanted to dig my old school. Two questions came up from this. So I:
dig @8.8.8.8 +recurse njcu.edu ANY
and the result is about 8 records, including the SOA record. One of them is this weird TXT record, and the other is... (1 Reply)
Hi,
I am testing some code to match a grep to see if one of the dns server exists but it does not seem to match:
ERROR:
=======
CRITICAL: google.com DNS : ns3.google.com NOT found
CODE:
=====
if ; then
echo "OK: google.com DNS : ns3.google.com exists"
else
echo... (5 Replies)
Hi there, I'm currently working on an exercise to connect to a Windows iscsi target via a Red Hat initiator machine. I'm using Windows Server 2012 and Red Hat Enterprise Linux v7.1
I have created the target on the Windows Server box and the two devices can communicate with each other. Verified... (3 Replies)
Discussion started by: Tech87
3 Replies
LEARN ABOUT DEBIAN
mail::verify
Mail::Verify(3pm) User Contributed Perl Documentation Mail::Verify(3pm)NAME
Mail::Verify - Utility to verify an email address
SYNOPSIS
use Mail::Verify;
DESCRIPTION
"Mail::Verify" provides a function CheckAddress function for verifying email addresses. First the syntax of the email address is checked,
then it verifies that there is at least one valid MX server accepting email for the domain. Using Net::DNS and IO::Socket a list of MX
records (or, falling back on a hosts A record) are checked to make sure at least one SMTP server is accepting connections.
ERRORS
Here are a list of return codes and what they mean:
0 The email address appears to be valid.
1 No email address was supplied.
2 There is a syntaxical error in the email address.
3 There are no DNS entries for the host in question (no MX records or A records).
4 There are no live SMTP servers accepting connections for this email address.
EXAMPLES
This example shows obtaining an email address from a form field and verifying it.
use CGI qw/:standard/;
use Mail::Verify;
my $q = new CGI;
[...]
my $email = $q->param("emailaddr");
my $email_ck = Mail::Verify::CheckAddress( $email );
if( $email_ck ) {
print '<h1>Form input error: Invalid email address.</h1>';
}
[...]
perl v5.8.8 2002-06-09 Mail::Verify(3pm)