g-stupid-things.as59645.net/mail/opensmtpd/mysql/2022/08/30/receiving-an-email.html
>
>
> -Original Message-
> From: mailop On Behalf Of Alessandro Vesely
> via mailop
> Sent: Wednesday, 23 November 2022 12:17
> To: mailop@mailop.org
> Cc: ti...@vt.edu
> Subject: Re
Greetings,
The Sender Policy Framework (SPF) is an easy way to check whether the
sender is authorized to send emails – however, it may cause some security
holes if it causes too many DNS lookups.
Together with researchers from Virginia Tech and Max-Planck-Institut für
Informatik, we would like
