Key Takeaway

If not all addresses are imported during the import process, this is usually due to the active opt out matching - a security feature that prevents previously unsubscribed recipients from being contacted again.

Detailed Explanation

During a subscriber import in Mailingwork, it may happen that not the complete number of subscribers from the import file is added to the subscriber list in Mailingwork. This behavior is not an error, but a deliberate process.

The Opt Out Matching process

During the import process, you will find the option to perform an opt out matching with the following settings in step 6 "Options":

• Across all subscriber lists
• Only in the lists being imported to
• Do not perform any check

If one of the first two options is activated, email addresses that have previously unsubscribed from your account will not be imported again.

Why is the Opt out matching important?

An opt out matching ensures that already unsubscribed subscribers are not accidentally imported into Mailingwork again and thus contacted again. This not only protects your recipients wish not to receive any more emails, but also helps to comply with legal requirements in email marketing.

Checking Non-Imported Addresses

You can see how many subscribers were not imported due to the opt out matching in the import details. You can find these under:

1. Subscribers > Import
2. Tab: Last imports
3. Detailed view of the relevant import

Tips

• Choose the option "no comparison with optout list" only if you are sure that no unsubscribed recipients are included in the import file
• The number of addresses excluded by the unsubscribe check can serve as an indicator of the quality of your import file