Amazon, you really should know better. Source ip: 54.240.4.4
https://search.arin.net/rdap/?query=54.240.4.4 Source Registry ARIN Kind Group Full Name Amazon SES Abuse Handle ASA152-ARIN Email [email protected]
RCPT To:<[email protected]>
<<< 550 #5.1.0 Address rejected. 550 5.1.1 <[email protected]>... User unknown
DATA
<<< 503 #5.5.1 RCPT first Jul 29 09:47:27 yuri sendmail[14067]: x6TGlQe4014062: to=<[email protected]>, ctladdr=<[email protected]> (500/500), delay=00:00:01, xdelay=00:00:01, mailer=esmtp92, relay=amazon-smtp.amazon.com. [207.171.188.4], dsn=5.1.1, stat=User unknown
