Thank you everyone. Is there any recommendation on other 3rd party senders that 
can be trusted instead of SendGrid. My last resort will be to setup some MTA's 
with the few free IP they have from the Datacenter. 

I also understand that the client is in the middle of a catch-22 in terms of 
sending email. I have already informed them that email will always be a best 
effort and not a guarantee. 

As for contacts other than email. Email is the last resort after all other 
avenues are attempted in the order of Snail Mail, Phone, SMS, and Social Media. 

Thanks,
 
Michael Irvine 

-----Original Message-----
From: mailop <mailop-boun...@mailop.org> On Behalf Of Jay Hennigan via mailop
Sent: Monday, March 25, 2024 1:37 PM
To: mailop@mailop.org
Subject: Re: [mailop] Debt Collection Client Email Servers

CAUTION: This email originated from outside of the organization. Do not click 
any links or open attachments unless you recognize the sender and know the 
content is safe.



On 3/22/24 14:58, Michael Peddemors via mailop wrote:
> If they are 'dedicated', doesn't matter if they are coming from 
> SendGrid, the PTR should reflect your clients domain.
>
> host 149.72.234.90
> 90.234.72.149.in-addr.arpa domain name pointer 
> wrqvzxrx.outbound-mail.sendgrid.net.

If Sendgrid claimed that these IPs are dedicated to you, their PTR says 
otherwise. It should reflect your sending domain. Note that Sendgrid has a 
rather poor reputation when it comes to spam exiting their network.

> And given the amount of abuse of SendGrid servers, anything you can do 
> to differentiate from their generic naming conventions will help you.

Or avoid Sendgrid entirely.

--
Jay Hennigan - j...@west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV

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