Quarantine is a process for temporarily suspending message sends to possibly erroneous contacts without deactivating the contact. Error contact check keeps a clean contact list, limits constant delivery errors and protects sender reputation. Dialog Insight applies quarantine in two ways, one required and the other optional.
Quarantine for invalid email or phone number
After a send, Dialog Insight occasionally receives a return from the destination server that the coordinates do not exist. When an invalid address or number is detected, Dialog Insight will automatically place this contact in quarantine for this communication channel. For example, if the email address is invalid, the contact will be placed in email quarantine and will receive more emails unless the quarantine is lifted.
There are very rare cases where an email address is placed in quarantine while the email is valid (ex: the destination server had temporarily deactivated the account or was in difficulty at the time of sending).
If after validation the remote server is restored, and you know that an email can be delivered, you can manually lift the quarantine. Never unquarantine an invalid address as this may negatively impact your sender reputation, which is used by destination servers and spam filters to determine your trust rating.
See Lift the quarantine.
Quarantine in case of repetitive delivery errors
Although the standard quarantine cleans up your contact list by temporarily deactivating contacts with invalid addresses or numbers, it is possible to further clean up your list by also quarantining contacts that register too many errors. delivery during a given period of time. This additional quarantine is optional but strongly recommended since it will reduce the error rate of your shipments and, by the same token, will improve the delivery of your future shipments.
When you enable it, you can define how many consecutive delivery errors are needed to trigger the quarantine, and over how long these errors should occur.