On 6/26/24 04:24, Jeff Peng via mailop wrote:
On 2024-06-26 15:11, Gellner, Oliver via mailop wrote:
On 26.06.2024 at 00:24 Jeff Pang via mailop wrote:
since aws ses was blocked, other esp such as mailchannel, mailgun,
sendgrid can be blocked also?
That's a good idea, except when you have to deal with companies like
Everbridge Inc or Tencent QQ, which apparently think it's a good
idea to
rent VMs at various cloud providers and run them with their default
config.
Amazon SES does not use email servers with PTR records that end with
compute-1.amazonaws.com, so it is not affected.
ec2-<ip>.compute-1.amazonaws.com is the default name of AWS instances
and only used where the owner did not specify his own domain. This is
akin to people sending emails from @...onmicrosoft.com or
@...azurewebsites.net or @...vps.ovh.<tld>
My mail server for domain simplemail.co.in has a ptr with the azure
domain as value:
$ dig mx.simplemail.co.in +short
20.120.225.36
$ dig -x 20.120.225.36 +short
tls-mail.westus2.cloudapp.azure.com.
do you think if I should change the ptr value to something other like my
own domain?
Yes, the domain in the PTR record should reflect the responsible party..
There are M3AAWG Best Practices articles that can go into more details..
But, for example.. this is your responsibility, not Azure's when you
have a spam leakage. If you want ordinary people to notify you, they
will go to your website as reflected in the domain in the PTR, to look
for contact information.
This is even more important than FCrDNS
Thanks.
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