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Should I turn off the catch-all feature?

By default, the catch-all will automatically turn off after the first 30 days.  When the catch-all feature is enabled our system will accept mail sent to any email address on your domain.  This feature is enabled for the first 30 days after setup so that we can automatically detect which email addresses are valid on your domain. Once the feature is disabled, our system will only accept mail that is sent to 'valid' addresses.

You have the option to override this behavior by signing in to the control panel and going to Settings -> Catch-all.  Be warned that domains that leave their catch-all enabled have received as much as 100 times the volume of email than they otherwise would with the feature disabled.

At any time, you can review the list of email addresses that we consider 'valid' for your domain by signing in to your control panel and going to Settings -> Email Recipients.  All 'valid' email addresses are listed under the Approved and Detected tabs.  Mail sent to addresses listed under the Invalid tab will be rejected and will not count agains the total number of messages filtered.

When email is received that has even one recipient listed that our system does not yet recognize, the message will initially be deferred.  This protects your domain from having a bunch of invalid email addresses added as recipients in SpamHero due to a spammer's dictionary attack.  (Spammers mail servers usually do not bother to re-send messages that initially fail to deliver.) Normally this causes only a short delay of the message, as legitimate sending mail servers will usually retry pretty quickly.  However, if there are several recipients listed on a message that our systems do not yet recognize, or the sending mail server is not configured to retry very often, then this greylisting may cause some significant delays in email deliveries until all legitimate email recipients are known by our service.

Disabling the catch-all feature will also disable greylisting automatically.  If you wish to leave the catch-all enabled but want greylisting disabled, contact our support team for assistance.  Be aware that having greylisting disabled while the catch-all is enabled may result in a large number of invalid email addresses being detected as valid.

Last updated July 5, 2021