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Overview:
If the primary mail server for a given domain
were to go down for maintenance or system difficulties,
the backup server would spool mail indefinitely
until the primary server was restored.
How a backup server works:
When mail is sent to the second MX record (your
MailMax Backup server), MailMax will queue the
email and attempt to send the email to a server
on the domain with a lower numbered MX record
than itself. It will keep trying until the primary
server is back online and the email is successfully
delivered.
Click HERE
for more information on how MailMax Backup
Servers work and are setup.
How to purchase a backup server:
Backup Servers are not built into MailMax, but
sold as an add-on. Click HERE
to purchase.
Benefit: Complete fault-tolerance
keeps you from ever losing mail again. |
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What
is Smart Hosting?
Use this feature to have MailMax collect email
for another host and deliver it to the specified
SMTP Server for final delivery.
How Smart Hosting works:
You might have an internal mail server running
without direct access to the internet, or you
might simply want to send all outbound mail to
your ISP's mail server to reduce the load on your
internal network.
Example:
The domain, SmartMax.com, is set to use Smart
Hosting.
If any user of SmartMax.com tries to send an (outbound)
email to an external server, the SmartMax SMTP
server will not actually send the email. The email
will be sent to the IP or host specified in the
Smart Host settings and their SMTP server will
send the email.
Note:
This feature is setup on a domain basis, so you
must configure the domain correctly in MailMax
in order for the email to be sent successfully.
You can enter an IP address or the fully qualified
host name (ex: mail.yourISP.com) in the Smart
Hosting settings.
Benefit: Greater Flexibility
for routing mail. |
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How
does Relay to Host/Hard Routing work?
All inbound mail addressed
to a domain of this type will be routed to the
specified host or IP address specified in the
'Delivery Address'. This allows you to route mail
to a specific domain without MailMax attempting
to do a traditional DNS lookup for the domain.
Benefit: Greater Flexibility
for routing mail. |
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What
is ETRN?
ETRN, short for Extended Turn, is an extension
to the SMTP mail delivery protocol. ETRN is a
command that starts the delivery of queued mail
for a specific domain.
How ETRN works:
Mail sent to an ETRN domain is simply accumulated
and not sent anywhere. When SMTPMax is contacted
and the ETRN command is sent to it by the client,
the mail is "de-spooled" to the correct mail host.
Example:
All email coming in for TESTCOMPANY.COM are queued
in the ISP/Exchange mail server. The TESTCOMPANY.COM
in-house mail server issues the ETRN command at
scheduled intervals to the ISP/Exchange mail server.
When the ISP/Exchange server receives the ETRN
command, it looks at the domain name that is specified
in the command and makes a local decision based
on the IP address from which the request has originated.
Now the ISP/Exchange server starts de-spooling
TESTCOMPANY.COM’s messages to the remote site
that is TESTCOMPANY.COM’s mail server. The in-house
mail server distributes the messages to appropriate
local mailboxes.
Benefit: This cost effective
ETRN mail spooling service enables small/mid sized
companies to reduce their cost by not having a
dedicated internet connection. |
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