Dealing with Newsletter and Subscription bombs
ExchangeDefender now protects you from malicious subscriptions to newsletters and emails you never opted into through “Subscription (Newsletter) Bomb Protection” available at admin.exchangedefender.com. By enabling the feature all newsletter “CAN-SPAM” “legitimate sender” content that you don’t want in your mailbox will automatically be filtered out as SureSPAM by ExchangeDefender.

The Bomb Issue
Hackers are currently exploiting security issues in newsletter software that allows them to add your email address to a mailing list without validation. If you’ve signed up for anything recently you know that you’re generally sent a confirmation email to validate you own the email address — well, hackers have found a way to add your email to the list without that step. Repeated thousands of times, it gives hackers a way to blow up your mailbox through a broadcast storm by otherwise legitimate senders who cannot tell your email address from thousands of others on their mailing list.

The ExchangeDefender Solution
ExchangeDefender already has a built-in newsletter management software (where you can have all of your newsletters skip your inbox and be available for reading online). We can effectively quarantine all the newsletters for you and allow you to read them online without them hitting your inbox and putting you over the quota. With the Subscription Bomb protection we go an extra step and outright classify these newsletters you haven’t subscribed to as SureSPAM. You can still access them but they won’t bother you or damage your Inbox or productivity.

There are 3 options:
Enabled: Protection is turned on and any newsletter will be flagged as SureSPAM. We do not recommend this option as it will catch all newsletters, whether you’ve subscribed to them or not.
Disabled: No protection. This is the default setting at the moment for all domains.
Whitelisted: Protection from newsletters but whitelisted ones will still get through. This allows you to have the best of both worlds: protection from newsletters you didn’t subscribe to but newsletters you want and have whitelisted will still come through. On January 1, 2019 this will be the default setting.

What do I tell my clients?
ExchangeDefender can now protect you from SPAM being generated by legitimate newsletter and subscription providers – if someone steals your identity (your email address, name, etc) they can subscribe you to newsletters without your knowledge or permission. Because the sending and management of these lists is automated, hackers can get an innocent third party to send you thousands of newsletters to clog up your inbox, make you wait for your email to download, and just make your email experience miserable.

ExchangeDefender can detect newsletters and “legitimate marketing emails” with unsubscribe or newsletter control keywords and automatically filter it out from you. Messages aren’t gone, you can still access them through admin.exchangedefender.com in realtime and on demand, but your Inbox will stay clean.