[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

Turritopsis Dohrnii Teo En Ming turritopsis.dohrnii at teo-en-ming.com
Tue Aug 14 01:28:46 UTC 2018

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.
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 

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