Resubscribing a blocked contact

A blocked contact is someone on your blacklist with the status "Hard bounce" or "Spam." Unlike contacts who are simply unsubscribed, you cannot manually remove blocked contacts from the blacklist yourself.

There are legitimate cases where a blocked contact wants to receive your emails again. Their email address may have been reactivated, or they may have changed their mind after filing a complaint. The only way to re-add them correctly is if they actively re-subscribe themselves, which provides documented consent.


Before you begin

  • Confirm that the contact has actively and voluntarily expressed that they want to re-subscribe. Do not initiate this process on your own.
  • Do not contact the blocked contact via email to send them the form. Use a non-email channel such as phone or in-person.
  • Have access to your Flexmail account to create or retrieve an opt-in form.


Option 1: Re-subscribe via an existing opt-in form

If you already have a Flexmail opt-in form on your website, ask the contact to subscribe through it. When they complete the double opt-in process, they are re-added to your account as a confirmed contact and removed from the blacklist automatically.


Option 2: Create a specific opt-in form for the re-subscription

If you do not have an opt-in form available, or if you want to handle this in a more controlled way, create a dedicated form and share the link directly with the contact. They fill it in themselves, confirm via email, and are then back in your active database.

Create the opt-in form

  1. Go to Forms, then Opt-in forms.
  2. Click Create new form.
  3. Enter a name and select the language for the form.
  4. Add the fields you want the contact to fill in, at minimum their email address
  5. In the form settings, choose the sender details for the confirmation email and optionally assign interests.
  6. Click Save form.

After you have created the opt-in form, you can find the HTML code via the Embed your form button. You need this code to add the form to a page.

On the pop-up screen, you can see the HTML code you can copy and a description of the best way to place this code on the landing page.



Creating a landing page

After the opt-in form has been made, you can create a landing page on which you can add the form. You can create a landing page via Automation > Landing pages.


  1. Click Create new landing page.

  2. Here, it is important that the HTML editor is chosen, because we have to add the opt-in form.


  3. Add a text and possibly an image or logo to this page. At the spot where you want to place your form, you have to add the HTML code that you previously saved while creating the opt-in form


  4. Save the first part under the head section of your HTML code. Add the second part of the code – the i-frame – to the body section, at the place where the form has to become visible. Click update to implement the changes

  5. You will not see the form in the message, but when you open the web version of the landing page , you can see the entire page with the form

You can use the link at the top of the web version to let contacts (re)subscribe to the database.



What happens next

When the contact fills in the form, they receive a confirmation email. Once they click the confirmation link, they are moved from the blacklist back to your confirmed contacts. Their previous blacklist status is replaced with a new confirmed status.

Attention  Do not send the form link via email to a blacklisted contact using another email tool or personal email. That would mean emailing someone who has not confirmed they want to hear from you, which is exactly what you are trying to avoid. Share the link through a non-email channel.


GDPR  The re-subscription process via opt-in form gives you fresh, documented consent for this contact. That is the correct legal basis for resuming email communication with someone who previously unsubscribed or filed a complaint.


Common mistakes to avoid

This is the most common mistake. It defeats the purpose of the re-subscription process and means you are emailing someone who has not yet given consent. Use the phone, deliver it in person, or use another communication channel.

Manually removing the contact from the blacklist without a re-subscription

Blocked contacts (hard bounce and spam categories) cannot be manually removed from the blacklist in Flexmail. Even for unsubscribed contacts who can be manually removed, doing so without fresh consent is a GDPR risk. Always use the opt-in form process.

Initiating the re-subscription on your own initiative

The contact must be the one who wants to re-subscribe. If you are reaching out to them to suggest they re-subscribe, you are already communicating with someone who has not given consent. The

process only applies when a contact contacts you and asks to be added back.


GDPR considerations

The re-subscription process creates a fresh consent record with a new opt-in timestamp. This is the correct legal basis for resuming email communication. Make sure to record the context, for example a note in your CRM that the contact called or visited in person and asked to be added back, in case the consent is ever questioned.

Next steps

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