Email Backup & Rescue Service - Secondary MX (Mail Exchanger)    7-Day Free Trial Available


Mail Backup FAQ

Give your email server a secondary MX and never let down your emails

If your mail server goes down or is inaccessible from the Internet, your Emails will automatically fail over to our backup MX server. Our mail server will queue your emails and automatically forward emails to your server after it comes back available.All email users will be able to read/reply Emails through our webmail or POP3 while your server is down.

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Email Backup & Rescue Highlights

Email backup and rescue
Secondary Mail Exchanger

  • Served as Secondary MX for your mail server
  • Store your emails for 5 days and can be extended to 30 days or more if needed
  • Unlimited storage space and mail boxes with 7 days free trial. Max Message sice 60MB
  • Automatically forward your emails to your server after it comes back online

  • Monitor Primary MX: Greatly Reduce Spam

  • Monitoring Mode: You may not know that more than 90% of spam will be sent to secondary MX instead of primary MX. We monitor your mail server and only take your emails when it is down. Otherwise, the email reaching our server will be rejected as greylisting and the spam server will usually give up the sending. The service will greatly reduce the spam emails to your mail server.

  • SPF, DKIM, Anti-Spam, Anti-Virus, Greylisting

  • All emails will be checked with SPF, DKIM, anti-spam, and anti-virus before being forwarded to your server.
  • We also look up multiple blacklist agents, like spamcop, to reduce spam.
  • Option to turn on GreyListing for your emails to reduce spam.

  • Resuce as your Mail is Down

  • Mail Rescue will allow your users to access their emails when your mail server is down.
  • Simply turn on Mail Rescue, and emails to your domain will be forwarded to our mail rescue server, which can be accessed via webmail or any email client using POP3 or IMAP.
  • You can fetch emails from the mail rescue server after your mail server is back online.


  • $ Pricing and Sign Up


    Only $24.99/domain/year. Unlimited storage space and mailboxes.

    How to Setup Email Backup for your domain?


    Setup is easy. If your domain is using our name server, you just need to sign up for the service for the domain, and everything will be setup automatically. If the domain is not using our name server, after signing up for the service, you just need to add smtp.dnsexit.com as the secondary MX for your domain in the domain's DNS.


    How to Signup


    You can click here to sign up for mail back MX for your domain. You may be asked to create an account with us first.
    If you are already logged into the member account:
    A - domain using other name servers instead of our name servers:
      At the main menu of your account, there is a link for "Signup Services" and choose "Mail Backup MX service" to sign up. Since the domain is not using our name servers, you must add our mail server, smtp.dnsexit.com as the backup MX for your domain at the DNS server serving your domain.
    B - domain using DNSEXIT name servers:
      You must first set up DNS for the domain and specify the primary MX at "MX Settings" of the domain DNS. Then, click on the "Mail Backup Service" link at "MX Settings" to add Mail Backup MX Service to the domain.


    Other Email Backup Features


    Option to have mail backup in monitoring mode: we check your mail server every 8 minutes and accept emails on your behalf only when your server is down.
    icon While in monitoring mode, you have the option to view your mail server uptime history.
    icon Backup MX in monitoring mode will greatly reduce the spam emails that hit your server since spam usually sends emails in reversed MX order and will drop out after hitting our mail server.
    icon Filter your emails with Spamassassin before forwarding emails to your server.
    icon Multiple backup servers to receive your emails. The maximum email message size is 60 MB. There is no limit on the number of queued messages or storage space for your domain.


    How Email Backup Rescue Works?


    's mail backup service acts as your second priority mail server. If your mail server cannot be reached, the mail will be routed to our mail backup server and wait in queues. Our server will keep checking your mail server every 20 minutes. Once your mail server is detected as available, our mail server will forward the emails to your mail server. Our mail server will keep attempting to deliver mail to your server for 5 days. Mails queued on our mail server for more than 5 days will be returned to the sender. You have the option to turn on spam checking on your emails. Emails found to be spam will be dropped before reaching your email server. A web interface was provided to check queued emails and even read your emails even when your mail server is down. You also have the option to set the mail back to monitoring mode, meaning that we will monitor your mail server every 8 minutes and will only accept emails for your domain when your server is down.

    While your mail server is down, you can turn on the Mail Rescue Mode for the backup, and all queued up emails will be re-routed to our mail rescue server, where all the domain's email users can access their corresponding mail boxes to read and reply to emails. After your mail server is available, you get the option to send all emails from their mail boxes to your own server.

    the diagram explains how email backup and rescue works


    SMTP Backup in Monitoring Mode


    The mail backup for your domain can be at Monitoring Mode. In this case, we will monitor your mail server and reject emails to your domain while your primary mail server is up.

    The advantage of using Monitoring Mode is that it will reduce at least 80% of spam emails hitting your server. As you may not know, that spam usually sends emails in reverse order. Or, in other words, they tend to send spam emails to secondary MX (while it is available) first instead. While sending spam in such large volumes, they usually won't bother to retry and will drop out if the sending attempts fail. Good emails should never hit the secondary MX while the primary MX is up.

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