Envelope From Address Rewriting

With the Envelope-From Address Rewriting service, you can modify the Envelope-From address of each email during processing. Common reasons for using this service include company policies that restrict the use of the customer’s own domain for certain communications (e.g., when contacting private individuals), requirements during a merger or acquisition, or security measures to protect the company’s domain and network from potential attacks.

This service automatically rewrites outbound email addresses (recipient and/or domain part). Technically, it modifies the Envelope-To address of emails based on a mapping list provided by the customer. The mapping file must include full email addresses (domain-only entries are not supported) and follow the required structure. Whitespaces are automatically removed during processing.

JSON

{
   "from":{
      "address":"local-part@sender-domain.com"
   },
   "rewriteFrom":{
      "address":"local-part@customer-rewrite-domain.com"
   }
}

We also offer the Bounce and Response Manager. It helps manage all email replies received via the Envelope-From address handled by Retarus. The service can automatically process replies and forward messages that require personal review.

📌 If you would like to use this service, please contact Retarus for further details and activation.

Push Notification samples

To ensure maximum visibility, Retarus includes additional information about this service in the push notification.

JSON

{
   "meta":{
      "account":"m4a_test_user",
      "customerNo":"99999",
      "tenant":"Test User",
      "receivedTs":"2020-10-16T05:54:11.043Z",
      "jobId":"rcpt-632cdc56-6480-406b-8faf-5a7e70876d0c",
      "version":"1"
   },
   "notifications":[
      {
         "meta":{
            "tag":"a813f47bca9ded6b0305885e235c073e886168b8b63eb5e99d02d00bcc7a6371",
            "mail":{
               "id":"rcpt-632cdc56-6480-406b-8faf-5a7e70876d0c",
               "email":"recipient <recipient@sample.com>",
               "from":"sender@sample.com",
               "mimeFrom":"sender@sample.com",
               "rewriteFrom":"sender@rewrite-sample.com"
            },
            "event":{
               "type":"DELIVERED",
               "phase":"DELIVER",
               "state":"FINISHED",
               "subType ":"OK",
               "ts":"2020-10-16T05:54:18.000Z",
               "description":"mail delivered"
            }
         },
         "content":{
            "mime":{
               "messageId":"<20201016-…54463a38@retarus.com>",
               "size":"884"
            },
            "smtp":{
               "responseCode":"250",
               "reason":"sent (250 2.0.0 Ok: queued as 3yFnZW2mNlzPk9y)",
               "relay":"mailin4.rmx.de[82.135.18.227]:25",
               "dsn":"2.0.0",
               "transportEncryption":{
                  "requested":true,
                  "established":true,
                  "properties":{
                     "protocol":"TLS1.2",
                     "cipherSuite":"example-cipher-suite"
                  }
               }
            }
         }
      }
   ]
}