In the Return-Path. "bounces+1234567" the number following bounces+ is the
SendGrid account ID.

On Tue, Aug 18, 2020 at 10:57 AM Carl Byington via mailop <mailop@mailop.org>
wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> On Tue, 2020-08-18 at 15:23 +0300, Atro Tossavainen via mailop wrote:
> > The SendGrid account sending these yesterday is 13999362.
>
> Where do you find that account number in the headers? I see some from
> today with "Upgrade (FINAL WARNING)" in the subject, but no indication
> of any sendgrid account number.
>
>
> -----BEGIN PGP SIGNATURE-----
>
> iHMEAREKADMWIQSuFMepaSkjWnTxQ5QvqPuaKVMWwQUCXzwT2hUcY2FybEBmaXZl
> LXRlbi1zZy5jb20ACgkQL6j7milTFsFoigCeONxnBFkM/QJI3Mky1A9XafBR+IQA
> oIUMyZCHGvGEjasL9fCb22Njyfer
> =+kBp
> -----END PGP SIGNATURE-----
>
>
>
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