[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 18.104.22.168 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
22.214.171.124.in-addr.arpa domain name pointer 126.96.36.199.static.m1net.com.sg.
Host 188.8.131.52.static.m1net.com.sg. not found: 3(NXDOMAIN)
The second is that the reverse and matching forward (points back to
184.108.40.206) 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:
;; AUTHORITY SECTION:
teo-en-ming.com. 112671 IN NS ns1.teo-en-ming.com.
teo-en-ming.com. 112671 IN NS ns2.teo-en-ming.com.
;; ADDITIONAL SECTION:
ns1.teo-en-ming.com. 3475 IN A 220.127.116.11
ns2.teo-en-ming.com. 3475 IN A 18.104.22.168
>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/
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