[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

[Lyle Giese]

The reverse lookup for 118.189.211.120 does not match your HELO greeting 
and does not match the A record for exchange.teo-en-ming.com.  Get your 
upstream ISP to fix that.

Lyle Giese
LCR Computer Services, Inc.

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.
>
> Thank you very much.
>      
>   
> ===BEGIN SIGNATURE===
> Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017
> [1] https://tdtemcerts.wordpress.com/
> [2] http://tdtemcerts.blogspot.sg/
> [3] https://www.scribd.com/user/270125049/Teo-En-Ming
> ===END SIGNATURE===
>      
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