[SOLVED] My Exchange server is now able to send email to httpd.apache.org domain after I added SPF TXT record to my DNS server

Matus UHLAR - fantomas uhlar at fantomas.sk
Tue Aug 14 18:15:18 UTC 2018

On 14.08.18 07:50, Lyle Giese wrote:
>The reverse lookup for does not match your HELO 

this does not matter much.
The HELO string exchange.teo-en-ming.com does exist, which is good.

> and does not match the A record for 

neither does this one.

> Get your upstream ISP to fix that.

this is the first and biggest problem, the reverse lookup points to non-existing host
name: domain name pointer
Host not found: 3(NXDOMAIN)

The second is that the reverse and matching forward (points back to should not be generic.

Yes, ISP pointing the reverse to exchange.teo-en-ming.com would be best

Btw, the OP should get second nameserver in different netwotk:

teo-en-ming.com.        112671  IN      NS      ns1.teo-en-ming.com.
teo-en-ming.com.        112671  IN      NS      ns2.teo-en-ming.com.

ns1.teo-en-ming.com.    3475    IN      A
ns2.teo-en-ming.com.    3475    IN      A

>On 8/13/2018 8:28 PM, Turritopsis Dohrnii Teo En Ming wrote:
>>Good morning from Singapore,
>>Previously the mail server at httpd.apache.org domain rejected all of my emails.
>>I have solved the problem by adding the following Sender Policy Framework (SPF) text (TXT) record to my DNS server:
>>teo-en-ming.com.       IN     TXT         "v=spf1 mx -all"
>>Now my Exchange server is finally able to send emails to the httpd.apache.org domain.
>>Am I an excellent troubleshooter?
>>However, the mail server at freebsd.org is still rejecting my emails. Adding SPF TXT record did not solve the problem for this domain (freebsd.org). Perhaps I need to configure DKIM as well? I have no idea what is DKIM.
>>Please help me to troubleshoot email delivery failure for the freebsd.org domain.

Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
I'm not interested in your website anymore.
If you need cookies, bake them yourself.

More information about the bind-users mailing list