Those who send newsletters often need to setup additional mailboxes
to receive the bounced messages (e.g. bounce@…)
and optionally one for receiving reply emails (e.g. news@…)
if you want to filter them and send automatic replies to the most common requests.
For this reason we introduced two mailboxes matched to your RealSender account:
email@example.com -> bounce@rsXXX-realsender.com
firstname.lastname@example.org -> news@rsXXX-realsender.com
Using a Mail-From address (also known as bounce/return-path/envelope address) with a domain other than the From address would break the DMARC authentication To use the "newsletter mailboxes" you need to set up a sub-domain of the From address e.g. the From address is: email@example.com the sub-domain could be: email.company-name.org CNAME rsXXX-realsender.com the Mail-From address becomes: firstname.lastname@example.org
The suggested configuration follows the rules
to send DMARC compliant emails on behalf of customers.
DMARC allows you to send authenticated emails using a sub-domain (such as email.company-name.org),
and still be able to use the top-level domain in the From: header (e.g. From: email@example.com).
No additional settings are required in the DNS of your domain name.
As per RFC1912 section 2.4: A CNAME record is not allowed to coexist with any other data. In other words, if email.company-name.org is an alias for rsXXX-realsender.com, you can't also have an MX record for email.company-name.org, or an A record, or even a TXT record
The mailboxes have been configured so that they can receive
large amounts of emails in a short time, as in the case of bounces.
!!! Please note: email messages are automatically deleted after 7 days !!!
To download the emails, you should configure your email client,
or the application that analyzes the bounced messages,
with the following POP3 server address: pop.rsXXX-realsender.com.
Usernames and passwords are available through the website’s restricted area.