--- title: "Find The Answer To If One Needs To Worry About Spam in Backup Email Server | DuoCircle" description: "Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in" image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/content/backup-mx/backup-email-server/" --- Content # Find The Answer To If One Needs To Worry About Spam in Backup Email Server Join the thousands of organizations that use DuoCircle Find out how affordable it is for your organization today and be pleasantly surprised.Interested in [ Talk to an Expert → ](/contact/) [ See what we make ](/products/) ## Find The Answer To If One Needs To Worry About Spam in Backup Email Server [MX Backup - Sign Up](/email/email-backup-mx) _The rationale behind opting for a backup email server is that the [backup MX record](/content/backup-mx/backup-mx-record) receives the messages when the primary server is down and delivers them to the latter when it is up and running_. Businesses can choose a [free backup MX](/content/backup-mx/free-backup-mx) option or go for dedicated software like [No IP backup MX](/content/backup-mx/noip-backup-mx) or [postfix backup MX](/content/backup-mx/postfix-backup-mx). Generally, SMTP servers queue undelivered messages for a few days only. On the other hand, with a **backup MX server**, you can store the unavailable messages for much longer. _Even though it looks like an advantage of the backup server over the routine SMTP one, it could also be risky_. That’s because if the SMTP server is down for long, one will have so many more undelivered emails in the **backup server** queue, which once sent, would bring down the reputation of the server for sending too many emails at a time, which is even considered nefarious by many receiving servers. ![backup mx](https://media.mailhop.org/duocircle/images/2019/10/backup-mx-services.png) ### Backup Mail Server And Spam _Since the backup email server does not employ the same [anti-spam measures](https://www.tripwire.com/state-of-security/security-data-protection/email-server-vulnerability-anti-spam-protection-techniques/) as the primary server, they become targets of malicious actors_. They cannot bypass the primary server’s strict firewalls. Another way through which spammers get inside the backup email servers is by not performing recipient validation. It accepts all messages from the backed-up domains and forwards them to the primary server. However, the primary server rejects all the invalid recipient emails, and the [backup MX](/content/backup-mx) server bounces back the emails to the sender. This bounce back or backscatter can send spam messages to innocent users. Additionally, since the receiving server becomes unavailable, the backscatter fills up the mail queue with bounced emails, which the **backup MX server** cannot deliver. Hence, _a backup email server with no recipient validation may get heavily attacked by spam_, and keep thousands of undelivered emails in the queue. Thus, while a backup email server may be an essential and beneficial tool that ensures business continuity in a server crisis, _it can sometimes act as a springboard for malicious actors to inject spam into the information system_. ##### Join the thousands of organizations that use DuoCircle --- Find out how affordable it is for your organization today and be pleasantly surprised. [MX Backup - Sign Up](/email/email-backup-mx)Interested in our Partner Program for MSPs and VARs? Visit Our [MSP Partner Program](/msp-partner-program). ## Ready to talk? Same-day response from someone technical. We tell you yes or no quickly. If yes, we get to work. [Talk to an Expert→](/contact/)[See what we make](/products/) ```json {"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. 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