Skip to main content
MailChannels is a general-purpose email delivery service used by hundreds of companies across 82 countries, processing email for millions of end users across over 600 web hosting networks.

​
What MailChannels does and does not store

  • MailChannels does not store copies of email messages. Messages are queued briefly (seconds to up to 6 hours) during delivery and are not retained after delivery completes.
  • MailChannels does not have information about the identity of individual end users who send email through the service.
  • Email delivery logs are retained for 35 days. We have no information about deliveries that occurred more than 35 days ago.
  • MailChannels adheres to privacy laws and regulations in the jurisdictions where it operates.

​
Investigating email headers

To determine the origin of an email sent through MailChannels, examine the following headers in the message:

​
X-MailChannels-SenderId

Identifies the MailChannels customer and the end user who sent the email.
  • Format: customername|identifier-type|enduser-identifier
  • Example: customername|x-authuser|enduser123
This indicates that enduser123 sent the email as a user of customername.

​
Received

Shows the IP addresses of machines from which the email originated. 
Received: from [192.0.2.1] (unknown [203.0.113.40])
  by smtp.mailchannels.net (Postfix) with ESMTPA id 1234ABCD
  for <recipient@example.com>;
  Wed, 11 Sep 2024 12:34:56 +0000 (UTC)
In this example, smtp.mailchannels.net received the email from 192.0.2.1. To investigate further, contact the owner of that IP address. Combining the IP address owner from the Received headers with the customer name from X-MailChannels-SenderId identifies the company with a direct relationship to the end user responsible for the message. If header analysis does not provide sufficient information, law enforcement officials should contact MailChannels directly:
  1. Email legal@mailchannels.com
  2. Include the full headers of any messages under investigation — without headers, MailChannels cannot assist
  3. Provide details of the investigation and the specific information you are seeking
MailChannels will assist with investigations to the best of its ability while respecting privacy obligations to customers and end users under applicable law.