Dnia 22.01.2021 o godz. 15:08:13 Hans-Martin Mosner via mailop pisze:
>    ----- Transcript of session follows -----
> ... while talking to aspmx.l.google.com.:
> >>> DATA
> <<< 552-5.7.0 This message was blocked because its content presents a 
> potential
> <<< 552-5.7.0 security issue. Please visit
> <<< 552-5.7.0  https://support.google.com/mail/?p=BlockedMessage to review our
> <<< 552 5.7.0 message content and attachment content guidelines. 
> s129si9974341ybc.279 - gsmtp
> 554 5.0.0 Service unavailable

Well, looks like they are using Google MX-es, so they have their mail hosted
on Google probably. And it looks like Google is blocking - like it usually
does - potential phishing content.

Strange that Sendgrid, being an email company, does not even self-host it's
company email, but resorts to Google for this. Doesn't look very
professional...
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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