Hi all,
in the last two days we have noticed that that the italian domain tim.it and alice.it bounces all the email from our account.
We also have tried using a dedicated IP but the problem persist.
Here the error we receive every time
{"notificationType":"Bounce","bounce":{"feedbackId":"0113018ae07b9841-85cd5ccf-7426-4d1e-bde2-5fcf5b07cb58-000000","bounceType":"Transient","bounceSubType":"General","bouncedRecipients":[{"emailAddress":"xxxxxxx@tim.it","action":"failed","status":"5.3.0","diagnosticCode":"smtp; 550 mail not accepted from blacklisted IP address [23.251.247.100]"}],"timestamp":"2023-09-29T10:28:30.000Z","remoteMtaIp":"34.141.161.132","reportingMTA":"dns; e246-9.smtp-out.eu-west-3.amazonses.com"},"mail":{"timestamp":"2023-09-29T10:28:29.527Z","source":"xxxxx@xxxxxx.xx","sourceArn":"arn:aws:ses:eu-west-3:xxxxxxxxxxxxxxxxxxxxx","sourceIp":"xxxxxxxxxx","callerIdentity":"root","sendingAccountId":"xxxxxxxxxxxxxxxxxxx","messageId":"0113018ae07b92d7-0c4bdedd-38da-4cf9-a480-8639e7242479-000000","destination":["xxxxxxxxxx@tim.it"],"headersTruncated":false,"headers":[{"name":"From","value":"xxxxxxxx@xxxxx.xx"},{"name":"To","value":"xxxxxxx@tim.it"},{"name":"Subject","value":"Prova AWS"},{"name":"MIME-Version","value":"1.0"},{"name":"Content-Type","value":"multipart/alternative; boundary="----=_Part_146504_123947408.1695983309531""}],"commonHeaders":{"from":["xxxxxx@xxxxxx.xx"],"to":["xxxxxxx@tim.it"],"subject":"Prova AWS"}}}
Thenk you but I as wrote we have tried also usign the SES shared IP with the same results. Also we have tried wit another Amazon root account, never used to send email with the same result. Here some of the ip that Tim.it/alice.it tell us are listed all in the eu-west-3 region: 23.251.246.55 23.251.247.100 23.251.246.56 23.251.246.58 23.251.246.9 23.251.246.10
Reagrds