Re: [mailop] [External] Re: Try to understand *.onmicrosoft.com

[Dave Brockman via mailop]

On 11/10/2022 10:52 AM, Bill Cole via mailop wrote:

Another datapoint: I do MS365 admin duty for multiple customers and *my* 
accounts for doing so are all authenticated as 
me@.onmicrosoft.com, but they have no mailboxes of their own 
and no licenses for any sort of end-user apps.


That is your choice.  You could easily make your admin account username 
@company.com instead of @company.onmicrosoft.com, if you have 
company.com registered with the tenancy.  You don't have to license or 
assign a mailbox to do this.


With Gratitude,

Dave Brockman
Senior Network Engineer
Gig City Cloud, LLC

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Re: [mailop] What am I supposed to do with abuse complaints on legit mail?

[Dave Brockman via mailop]

On 1/17/2022 2:09 PM, John Levine via mailop wrote:

It appears that Scott Mutter via mailop  said:

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On Mon, Jan 17, 2022 at 12:06 PM Grant Taylor via mailop 
wrote:


Drive by comment:

What if we had something like an MX record published for the IP
address(es) in reverse DNS / in-addr.arpa for
... and configure those MX records to route to a mail server
of the owners / administrators of the IP (space) in question?



Do reverse DNS entries support the TXT structure?  Why not just create a
special, specific TXT record for a contact email address?


This might be a good time to review the RP DNS record.  See RFC 1183.

As far as I can tell, I am the only person in the world that still
publishes them.


I agree with this assessment.

Regards,

--dtb

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