You are right, far too many companies big enough to at least get a dedicated IP, instead of a shared IP, they should have custom PTR's, and *shudder* their SPF records included all of SendGrid, so needless to say they are very vulnerable to spoofing and phishing..

Someone should write a small article about this for awareness.

On 2024-10-14 05:58, Robert Giles via mailop wrote:
On 10/14/2024 at 07:17, Marco Moock via mailop wrote:
They simply ignore mails to that address. It is a company that at least
tolerates spammers using their services.

I recommend rejecting all mail from them.

The problem is convincing Sendgrid's customers - like Aegean S.A. - to quit and insource their own e-mail again.

As a single example, boarding passes, baggage receipts, gate changes all burp out of Sendgrid:

Received: from xvfrqqdh.outbound-mail.sendgrid.net (xvfrqqdh.outbound-mail.sendgrid.net [168.245.68.208])
     (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
     key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256)
     (No client certificate requested)
     by skylane.cscweb.net (Postfix) with ESMTPS id 9DB9B10410
From: Aegean <[email protected]>
Subject: Information about your flight: Gate information

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