MailerLiteOpen-tracking pixel, click tracking and unsubscribe

All email tracking is enabled by default in MailerLite. … Opens tracking - Tracks opens using an invisible beacon embedded in your campaign.

Caveat Active by default, across the whole account. The page does not say which domain serves the image without domain alignment. Other vendor pages link opens to each subscriber ("Subscriber activity" tab in reports) and record their IP address on the first open ("How to check opens by location").

How to enable and disable tracking in MailerLite campaigns · Help centre · page dated 09/08/2023 · last reviewed on 09/11/2026 · confidence high

Every link in a MailerLite campaign includes unique tracking information tied to the original subscriber.

Caveat By default, links go through the vendor's domains — mlsend, mlsend2, mlflow ("What is mlsend?"). None of the pages read documents a setting that switches this tracking off: switching off open tracking leaves it in place ("Regular clicks will still be tracked and reported").

How To Analyze And Export Reports · Help centre · page dated 04/02/2026 · last reviewed on 09/11/2026 · confidence high

If you wish to disable any tracking for a particular campaign or automation email, you can do so before sending.

Caveat The setting applies to one campaign or automation email, before sending. The page does not say on which plans, nor which prevails if the account default differs.

How to enable and disable tracking in MailerLite campaigns · Help centre · page dated 09/08/2023 · last reviewed on 09/11/2026 · confidence high

By default, MailerLite emails include a list-unsubscribe header, and no configuration is needed.

Caveat The page does not say whether the header carries a mailto:, a URL or both; test sends do not carry one. The vendor has no transactional sending.

A simple guide: List-unsubscribe header and one-click unsubscribe · Help centre · page dated 01/08/2024 · last reviewed on 09/11/2026 · confidence high

In MailerLite emails, the one-click list-unsubscribe mechanism is included by default and requires no further configuration within your account.

Caveat Presented in light of the Google and Yahoo requirements of February 2024, with no date of introduction.

A simple guide: List-unsubscribe header and one-click unsubscribe · Help centre · page dated 01/08/2024 · last reviewed on 09/11/2026 · confidence high

An email marketing Preference center is a landing page that lets your subscribers specify what kind of messages they want to receive from you.

Caveat A paid feature (Comfort and Power plans), hosted by the vendor. Subscribers reach it only after clicking the link in a confirmation email; there they choose a frequency, interest groups, or answer open questions.

How to use the Preference Center · Help centre · page dated 06/16/2026 · last reviewed on 09/11/2026 · confidence high

We don't offer an SMTP infrastructure at this moment.

Caveat Transactional sending is redirected to MailerSend, a partner company and separate product, or to an automation triggered by the API. The page dates from 2022.

Does MailerLite Offer SMTP (Simple Mail Transfer Protocol)? · Help centre · page dated 09/14/2022 · last reviewed on 09/11/2026 · confidence high

Add the DKIM as a CNAME record, the SPF as a TXT record, and a Domain verification as a TXT record.

Caveat Neither the selector nor the CNAME target appears on the page: the values are shown in the account. It does not say whether the signature carries the brand's domain. Authentication is required as soon as a custom domain is used for sending, except during the 14-day trial of a new account.

Domain authentication · Help centre · page dated 06/22/2026 · last reviewed on 09/11/2026 · confidence high

Now, you want to authenticate your domain with MailerLite, so you have to add the second SPF record to your DNS page. v=spf1 a mx include:_spf.mlsend.com ~all

Caveat The include is given in an example of merging with an Outlook record; the authentication page refers to the values shown in the account.

How To Merge SPF Records · Help centre · page dated 02/28/2024 · last reviewed on 09/11/2026 · confidence high

Domain alignment (also called identifier alignment) is a process that checks if an email’s sending domain in the 'From' field matches the authenticated domain, ensuring the email is genuinely from the sender it claims to be from.

Caveat Alignment is optional ("not mandatory, but it is highly recommended") and is set up on a dedicated subdomain. The DMARC policy is left to the brand: the vendor calls it essential from around 5,000 sends and recommends a specialist provider ("The basics of DMARC").

How To Align Your Domain · Help centre · page dated 02/16/2024 · last reviewed on 09/11/2026 · confidence high

If you already have a paid or custom domain, we won't make any changes to your "From" address when you send emails through MailerLite.

Caveat Without a custom domain, the vendor rewrites the sender address onto its own subdomain (john.yahoo.com@send.mailerlite.eu); this fallback does not exist above 50,000 subscribers, where an authenticated domain is required.

The Limitations Of Using A Free Domain · Help centre · page dated 06/22/2026 · last reviewed on 09/11/2026 · confidence high

Domain alignment enables the consistent use of your domain throughout the email message, specifically in: … Tracking links: Unique links that provide data and analytics related to your domain

Caveat Optional. Set up through three records, A, MX and TXT, on a dedicated subdomain, not through a CNAME. Without it, links go through the vendor's domains ("What is mlsend?"). The page cites tracking links and links placed on images, not the open-tracking image.

How To Align Your Domain · Help centre · page dated 02/16/2024 · last reviewed on 09/11/2026 · confidence high

Check your account activity : Review your recent account activity (sent campaigns, subscribers imported or deleted) to identify any unauthorized actions.

Caveat Recent account activity can be viewed — campaigns sent, subscribers imported or deleted — but the page says neither whether setting changes appear there, nor whether it can be exported.

Keeping your MailerLite account secure · Help centre · page dated 01/15/2026 · last reviewed on 09/11/2026 · confidence high

Create, update, list, and delete the custom fields you can attach to subscribers.

Caveat Tracking settings are exposed only at campaign level, through the "track_opens" parameter of the campaigns API; none of the pages read exposes a tracking setting per subscriber.

Fields · API documentation · last reviewed on 09/11/2026 · confidence high

opted_in_at string no Must be a valid date in the format yyyy-MM-dd HH:mm:ss optin_ip string no Must be a valid ip address

Caveat The subscriber carries a date and an IP address for sign-up and for confirmation, and an unsubscribe date (subscribed_at, ip_address, opted_in_at, optin_ip, unsubscribed_at), readable through the API: one state per step, not the history of its changes, and nothing on consent to tracking.

Subscribers · API documentation · last reviewed on 09/11/2026 · confidence high

If you wish to disable any tracking for a particular campaign or automation email … You can also set your tracking preferences in your Default settings.

Caveat Two documented levels: the account default and each campaign or automation email. Nothing at contact, group or segment level, and the page does not say which prevails when the two differ.

How to enable and disable tracking in MailerLite campaigns · Help centre · page dated 09/08/2023 · last reviewed on 09/11/2026 · confidence high