FAQ about mxSENTRY
What is mxSENTRY?
mxSENTRY is an advanced email protection and security
solution by NetDexia, which safeguards email from spam,
viruses, worms, email attacks, malicious content and other
email threats.
Does the mxSENTRY decrease the security of our email?
No. On average, a single email experiences 7–10 “hops” (the
number of routers through which it is sent) as it travels
from sender to recipient. mxSENTRY becomes the final “hop”
in the journey. But even by adding this extra “hop,” you are
introducing no additional insecurity to the process of
sending or receiving email. In fact, while the mxSENTRY acts
like any other router in the transmission process, it
actually adds a layer of security to your email by shielding
your MX record from the Internet, where it may otherwise be
accessible by spammers and hackers.
What is an MX record?
A Mail Exchange record, or MX record, is an entry in a
domain-name database that identifies the mail server
responsible for handling email for that domain. In other
words, your MX record is like your primary postal address,
to which all of your mail is sent. When you use mxSENTRY,
you change your MX record to make the address of mxSENTRY
your primary mail server address so all email from the
internet are sent to mxSENTRY first. This conceals your
Internet-facing mail servers and gateways and protects you
from attack. mxSENTRY then filters your email as it is
redirected to your true address.
If it is required that we point our MX record to
mxSENTRY, does this mean you will have access to our email?
No. While NetDexia’s filters do comprise the final “hop” a
message takes en route to your network, we do not have the
capabilities to intercept or review email. mxSENTRY message
processing centers, which becomes your primary MX record,
act as proxies when receiving your inbound email. Messages
are filtered in real-time as they are being simultaneously
delivered into your messaging environment. Because
mxSENTRY's service is proxy-based, your messages are not
stored to disk in order to be filtered, where they can be
lost if the disk is damaged or corrupted (this can occur
with solutions that use store-and-forward technology). In
fact, mxSENTRY's technology introduces more security by
cloaking the location of your messaging servers and removing
anonymous SMTP connections.
Do we lose control of our MX record when we point it to
the mxSENTRY?
No. The MX record remains in your control. At anytime your
MX record may be configured to point back to your messaging
infrastructure. You may also lower your MX record’s
time-to-live (TTL) to increase propagation times.
Will our email be stored on the mxSENTRY servers?
Unlike a number of companies, mxSENTRY does not use a “store
and forward” process for filtering messages. Therefore the
mxSENTRY does not accept your email, store it on servers,
scan it, and then send it on (“store and forward”). Instead,
mxSENTRY's proxy-based method filters email real-time “on
the stream”. Legitimate emails are never written to any
media unless our customer requests it. In fact, mxSENTRY
handles all mail processing via memory and only stores
quarantined mail to hard disk.
Does the mxSENTRY filtering work when I send mail or only
when I receive it?
mxSENTRY filtering only works on inbound messages.
Does mxSENTRY filter email internal to our network?
As a proxy-based managed service, the mxSENTRY currently
does not offer filtering for email sent within an internal
messaging network (intranet).
How do I know what mail has been blocked as spam?
End users receive a
Spam Quarantine
Report in their inbox that contains a link to their
quarantine. This notification allows them to access blocked
messages and restore messages from quarantine, if desired,
and easily configure the system to allow those types of
email in the future.
Is there a risk that legitimate email sent to our company
will accidentally be blocked?
mxSENTRY's multi-layered Stacked Classification Framework
™
provides over 98% filtering accuracy and an
industry-leading low false positive rate (legitimate email
incorrectly marked as spam). In the rare event of a false
positive, the mxSENTRY provides each end-user with a daily
Spam Quarantine Report that enables end-users to locate any
legitimate emails, release them to their inbox, and ensure
that those messages are not blocked in the future.
Furthermore, to enable certain types of content and
attachments to pass through mxSENTRY's filters, any allow
lists, deny lists, or keyword lists that have been developed
specifically by mxSENTRY customers can be uploaded to the
mxSENTRY Portal to enable customized, regulation-compliant
message filtering.
Do I need a password to view messages blocked as spam?
No. You can directly access and view spam through the Spam
Quarantine Report that is emailed to your inbox.
How does mxSENTRY identify and block spammer attacks? Do
you have a team dedicated to monitoring and protecting
against spammer and worm attacks?
mxSENTRY has the industry’s foremost experts on messaging
and has leveraged that expertise in their Threat Management
Center—mxSENTRY's around-the-clock email threat monitoring
center. The Threat Management team is continuously watching
the flow of email through our system for new spammer
techniques, DoS attacks, viruses, worms, or any other threat
that can enter and harm a customer’s network.
Does the mxSENTRY compromise privacy?
mxSENTRY takes the security and privacy of user data
seriously. Messages are filtered in real-time as they are
being simultaneously delivered into yours messaging
environment. Because mxSENTRY's service is proxy-based, your
messages are not stored to disk in order to be filtered,
where they can be lost if the disk is damaged or corrupted
nor can they be read.
mxSENTRY
Packages
