As part of our ongoing attempt to combat spam within our email systems, on Monday Feb 26th we will be changing our postfix configuration settings to prohibit email being sent from addresses with domains which don’t match the account logging in. Our previous practice of allowing an authenticated account to specify whatever “from” headers they wish has been exploited by spammers and cannot be continued at this point. If you are currently in the habit of logging into one account to send email for multiple domains you will want to create easymail accounts within each domain you use for sending email.
As part of this clients will no longer be able to send through subdomains of their domain, so an account for example.com would no longer be able to send email for addresses within sub.example.com. In order to be able to send from an address @sub.example.com, clients will now need to create an MX record for sub.example.com and then go to the easymail link on the email tab for the parent domain, example.com. You will see you have the ability to enable and create email accounts under the sub.example.com hostname, and you will need to create at least one email account for sub.example.com to authenticate through in order to be able to send for addresses within that level of the domain.