This article recommends making use of double opt-in.
If your account was created on or after 7 September 2016, or if your account was created prior to this date but you'd never generated a signup form before, then you're already protected by double opt-in by default.
If your account was created before 7 September 2016 and you'd already generated one of our signup forms, then you'll need to enable double opt-in if you want the protection it brings.
|Significance of opt-in types|
|» Changing a contact's opt-in type|
|More on the different opt-in types|
|» Verified double|
Every contact in each of your address books has an opt-in type.
This opt-in type shows you how a contact opted into your campaigns.
You can find and change a contact's opt-in type on the 'List contacts' page by going to Contacts > My contacts and by clicking an address book.
Contacts can have one of the following four different opt-in types:
Opt-in types can show you how engaged your contacts are. For example, if contacts have a verified double opt-in type, then they're more likely to be interested in receiving your campaigns because they've taken the time to not only opt in but also to open the verification email and click the link.
Verified double opt-in is best practice for adding contacts to your address books. If you receive any unfair spam complaints, verified double opt-in gives you proof that a contact opted in because we keep that proof in our records.
If contacts complain or query their subscription and opt-in type, you can go to the 'Manage contact' page to find their last subscribe date as well as their opt-in type.
- Go to Contacts > My contacts
- Find the contact in the appropriate address book, and click the icon in the 'Edit' column
- Mouse over the 'Opt-in type' tile, and click the opt-in type link
- In the 'Edit' side panel, click on the link under 'Opt-in type'
- In the 'Opt-in type' side panel, choose the appropriate opt-in type and click Apply
If you change your contacts' opt-in types to verified double, we send them a verification email. The opt-in type of those contacts will change only after they click the link in the verification email.
When you either bulk import contacts or individually add contacts to your address books, these contacts have an unknown opt-in type.
If contacts have an unknown opt-in type, it's your responsibility to make sure that you can legally hold their details. This opt-in type means that we don't know how these contacts have been sourced or if they willingly opted into your campaigns. Although our Data Watchdog checks that your address books are clear from problematic data, it's your responsibility to make sure that you send emails only to contacts who've opted in.
If you send unsolicited emails, you expose yourself to complaints from anti-spam authorities, which could blacklist you. Blacklisting affects both your reputation and deliverability rates and our reputation and deliverability rates.
A single opt-in type means that when contacts opted in to receive your campaigns (via a signup form for instance), they weren't subsequently required to verify their email address (known as double opt-in).
We don't recommend single opt-in because anyone could opt into your campaigns on behalf of a contact. As a result, you could send unsolicited emails to these contacts and risk spam complaints.
Note: Double opt-in is usually enabled on accounts by default - see Information above. You can check this by clicking the person-and-cog icon in the bottom left corner of the app, and then selecting Account > Account settings from the settings menu that appears. Scroll down to 'Features' and check whether 'Enable double opt-in in my list signups' is ticked.
A double opt-in type means that before contacts can receive your campaigns, those contacts must click a link in a verification email that you send them after they opt in. By clicking this link, you know that the email address that those contacts provided belongs to them.
Unlike the verified double opt-in type, we do not send the verification email for a double opt-in type. We leave this up to you to send, and we rely on your honesty in changing contacts' opt-in types to double opt-in only if it's true.
Note: If contacts contest their double opt-in type, then you need to have a record of it. We don't keep records of double opt-in types because we don't send the verification emails.
A verified double opt-in type means that before contacts can receive your campaigns, those contacts must click a link in the verification email that we send them after they opt in.
You can set up and customise the verification email that we send to contacts with a verified double opt-in type. For details, see Using 'double opt-in'.
As well as setting up verified double opt-in for contacts who opt in through a signup form, you can also set up verified double opt-in for contacts who are already in your address books.
If you set up verified double opt-in for contacts who are already in your address books, we immediately remove them from all of your address books until they click the verification link in the email that we send them.
We recommend using verified double opt-in if you want to comply with what is considered best practice. Note that double opt-in is usually enabled on accounts by default - see Information above.