An email address or a phone number can be quarantined, for example, when the mailbox is full or if the address does not exist.
In any case, the quarantine procedure complies with specific rules described in this section.
The profiles whose email addresses or phone number are in quarantine are automatically excluded during message preparation (see Identifying quarantined addresses for a delivery). This will speed up deliveries, as the error rate has a significant effect on delivery speed.
Some internet access providers automatically consider emails to be spam if the rate of invalid addresses is too high. Quarantine therefore allows you to avoid being added to denylist by these providers.
Moreover, quarantines help reducing SMS sending costs by excluding erroneous phone numbers from deliveries.
For more on best practices to secure and optimize your deliveries, refer to this page.
Quarantine and denylist do not apply to the same object:
Quarantine applies only to an address (or phone number, etc.), not to the profile itself. For example, a profile whose email address is quarantined could update their profile and enter a new address, and could then be targeted by delivery actions again. Likewise, if two profiles happen to have the same phone number, they will both be affected if the number is quarantined.
Being on the denylist, on the other hand, will result in the profile no longer being targeted by the delivery, such as after an unsubscription (opt-out), for a given channel. For example, if a profile on the denylist for the email channel has two email addresses, both addresses will be excluded from delivery. For more on the denylist process, refer to About opt-in and opt-out in Campaign.
You can check if a profile is on the denylist for one or more channels in the No longer contact (on denylist) section of the profile’s General tab. See this section.
Quarantine includes an On denylist status, which applies when recipients report your message as spam or reply to an SMS message with a keyword such as “STOP”. In that case, the profile’s involved address or phone number is sent to quarantine with the On denylist status. For more on managing STOP SMS messages, refer to this section.
Quarantined addresses can be displayed for a specific delivery or for the entire platform.
Quarantined addresses for a specific delivery are listed during the delivery preparation phase, in the Exclusion logs tab of the delivery dashboard (see this section). For more on delivery preparation, refer to this section.
Administrators can access the detailed list of the email addresses in quarantine for the entire platform from the Administration > Channels > Quarantines > Addresses menu.
The increase in the number of quarantines is a normal effect, related to the “wear and tear” of the database. For example, if the lifetime of an email address is considered to be three years and the recipient table increases by 50% each year, the increase in quarantines can be calculated as follows: End of Year 1: (1*0.33)/(1+0.5)=22%. End of Year 2: ((1.22*0.33)+0.33)/(1.5+0.75)=32.5%.
Filters are available to help you browse through the list. You can filter on the address, the status, and/or the channel.
You can edit or delete each entry, as well as create new ones.
To edit an entry, click the corresponding row and modify the fields as needed.
To manually add a new entry, use the Create button.
Define the address (or phone number, etc.) and channel type. You can set a status for being in the quarantine list and an error reason. You can also indicate the date when the error occurred, the number of errors, and enter the error text. If needed, select the last delivery that was sent to the address from the drop-down list.
Addresses that match specific conditions are automatically deleted from the quarantine list by the Database cleanup workflow. Learn more about technical workflows, see this section.
The addresses are automatically removed from the quarantine list in the following cases:
Their status then changes to Valid.
The maximum number of retries to be performed in case of Erroneous status and the minimum delay between retries are now based on how well an IP is performing both historically and currently at a given domain.
Recipients with an address in a Quarantine or Denylisted status are never removed, even if they receive an email.
You can also un-quarantine an address manually. To manually remove an address from the quarantine list, you can remove it from the quarantine list or change its status to Valid.
Select the address from the Administration > Channels > Quarantines > Addresses list and select Delete element.
Select an address and change its Status to Valid.
You might need to perform bulk updates on the quarantine list, for example in case of an ISP outage. In such case, emails are wrongly marked as bounces because they cannot be successfully delivered to their recipient. These addresses must be removed from the quarantine list.
To perform this, create a workflow and add a Query activity on your quarantine table to filter out all impacted recipients. Once identified, they can be removed from the quarantine list, and included in future Campaign email deliveries.
Based on the timeframe of the incident, below are the recommended guidelines for this query.
Error text (quarantine text) contains “550-5.1.1” AND Error text (quarantine text) contains “support.ISP.com”
where “support.ISP.com” can be: “support.apple.com” or “support.google.com” for example
Update status (@lastModified) on or after MM/DD/YYYY HH:MM:SS AM
Update status (@lastModified) on or before MM/DD/YYYY HH:MM:SS PM
Once you have the list of affected recipients, add an Update data activity to set their email address status to Valid so they will be removed from the quarantine list by the Database cleanup workflow. You can also just delete them from the quarantine table.
Adobe Campaign manages quarantine according to the delivery failure type and the reason assigned during error messages qualification (see Delivery failure types and reasons and Bounce mail qualification).
If a user qualifies an email as a spam (feedback loop), the message is automatically redirected towards a technical mailbox managed by Adobe. The user’s email address is then automatically sent to quarantine with the On denylist status. This status refers to the address only, the profile is not on the denylist, so that the user continues receiving SMS messages and push notifications.
Quarantine in Adobe Campaign is case sensitive. Make sure to import email addresses in lower case, so that they are not retargeted later on.
In the list of quarantined addresses (see Identifying quarantined addresses for the entire platform), the Error reason field indicates why the selected address was placed in quarantine.
As opposed to hard errors, soft errors do not send immediately an address to quarantine, but instead they increment an error counter.
Retries will be performed during the delivery duration. When the error counter reaches the limit threshold, the address goes into quarantine. For more on this, refer to Retries after a delivery temporary failure.
The error counter is reinitialized if the last significant error occurred more than 10 days ago. The address status then changes to Valid and it is deleted from the list of quarantines by the Database cleanup workflow. (For more on technical workflows, see this section.)