Twilio SendGridOpen-tracking pixel, click tracking and unsubscribe
Twilio SendGrid can insert an open-tracking pixel, and lets you remove it campaign by campaign. In our corpus, 40 of the 42 emails sent through Twilio SendGrid, by 9 brands, loaded an open-tracking pixel (95%).
API / Transactionnel · Twilio · vendor's site ↗ · code sendgrid
American sending infrastructure, acquired by Twilio in 2019 and widely used for transactional email. It is often used behind a marketing tool rather than directly.
Postmetry reference sheet
What the vendor says, checked by us
7 sources · last reviewed on 09/11/2026. Still not checked: Native consent collection, Tracking anonymization, List-Unsubscribe, RFC 8058 — one click, Transactional exceptions, DMARC, Sending domain, Logging, API, Consent history.
Postmetry corpus
What brands actually send
42 messages received from 08/08/2026 to 10/30/2026.
Postmetry reference sheet
What this ESP allows
Catalog shared by both pages. Each note carries its source, its date, and its confidence level.
On the right, what our emails say about it: matching, contradicted, never observed despite the volume, too few emails to conclude — or out of reach, when the capability can't be read from an email.
Tracking 2 not met · 1 partial · 2 not verified
Open pixel Yes 1 note · 20/08/2026 Consistent seen on 31 of 31 emails from 5 brands, 1 months
Open tracking adds an transparent one pixel image to the end of the email
Caveat The typo "an transparent" is reproduced as is. Switch at account level (Settings > Tracking); pixel served from the branded domain if link branding is active. The same page carries the consent/privacy warning — for Marketing Campaigns only.
Tracking settings · Help centre · last reviewed on 08/20/2026 · confidence medium
Click tracking Yes 1 note · 20/08/2026 Consistent seen on 27 of 31 emails from 5 brands, 1 months
Click Tracking overrides all the links and URLs in your emails
Caveat Up to 1,000 links per email; plain text optional; set per account/subuser, overridden per message via mail/send tracking_settings (reference to be anchored in a second pass).
Retrieve Click Track Settings · API documentation · last reviewed on 08/20/2026 · confidence high
Traceable choice No 1 note · 04/08/2026 Out of reach
Tracking is switched off in the SMTP or API parameters, so technically per recipient. But the tool keeps no consent register: it is up to the client's software to decide, contact by contact. The capability exists; the mechanism that uses it is not provided.
Observations in the interface, first batch · Help centre · last reviewed on 08/04/2026 · confidence medium
Unsubscribe 1 partial · 3 not verified
Preferences page Partially 1 note · 20/08/2026
The HTML that will be displayed on the page that your customers will see
Caveat Subscription tracking = automatic unsubscribe link plus a page hosted on SendGrid's servers, customisable HTML, custom URL possible. Unsubscribe groups (preferences by category) are not on the pages read.
Update Subscription Tracking Settings · API documentation · last reviewed on 08/20/2026 · confidence high
Authentication 2 not verified
DKIM Yes 1 note · 20/08/2026 Consistent seen on 42 of 42 emails from 9 brands, 3 months
Twilio SendGrid can create and update your SPF and DKIM records on your behalf
Caveat "automated security": SPF/DKIM delegated through CNAME, with SendGrid updating the records (a dedicated IP is added to SPF automatically). The classic selectors s1/s2 are not cited on the page — an observation from our corpus.
Configure domain authentication · Help centre · last reviewed on 08/20/2026 · confidence medium
SPF Yes 1 note · 20/08/2026 Consistent seen on 42 of 42 emails from 9 brands, 3 months
One CNAME record that points mail from your branded URL to the Twilio SendGrid email service and supports SPF and DKIM.
Caveat Same page as dkim — shared source note. SPF carried by the delegated CNAME (automated security ON) or by MX plus manual records (OFF).
Configure domain authentication · Help centre · last reviewed on 08/20/2026 · confidence medium
Tracking domain Yes 1 note · 11/09/2026 Too few emails out of 31 emails from 5 brands, 1 months
To serve all of the click-tracked links, opens, and images in your emails from your domain, use Email link branding. This replaces sendgrid.net for Global Email send or eu.sendgrid.net for Regional Email send with your domain.
Caveat Optional, set up through CNAME records. The page reserves EU-pinned domains "or link branding" for Email API Pro and Marketing Campaigns Advanced plans or higher, without saying clearly whether the condition applies outside the EU.
How to set up link branding · Help centre · last reviewed on 09/11/2026 · confidence medium
Infrastructure & governance 1 partial · 3 not verified
Granularity of settings Partially 1 note · 20/08/2026 Out of reach
When making a call on behalf of a customer account, the property value should be "account-id" followed by the customer account's ID (e.g., on-behalf-of: account-id ).
Caveat Levels: parent account / subusers (on-behalf-of header) / account settings / per-message override (mail/send). The exact override rule is not set out on the pages read.
Get Open Tracking Settings · API documentation · last reviewed on 08/20/2026 · confidence high
Postmetry corpus
Observed in our corpus
Recorded by our analyzers on messages received on addresses we control. Nothing from the reference sheet here, no access to the tool.
Out of the 42 messages received
40 messages out of 42
33 messages out of 42
33 messages out of 42
Period observed
08/2026 → 30/10/2026
3 months, 9 distinct brands.
Identification signals
What we recognized the sending platform by, message by message.
- X-SG-ID 95 %
- smtpapi 5 %
Limits of this analysis
It doesn't say what a brand has actually configured. A sending platform that allows turning off the pixel says nothing about which brands have done so — that's what a brand's report answers.
It doesn't rank. No score, no recommendation: capabilities don't carry the same weight depending on the use, and that weight isn't ours to set.
A “not checked” cell is not a “no”. It says nobody has gone to look yet, and nothing else.
The corpus does not establish a capability. A rate of observed pixels says what brands send, not what the tool can do.
Sources
7 sources- Update Subscription Tracking Settings API documentation · confidence high 20/08/2026
- Tracking settings Help centre · confidence medium 20/08/2026
- Retrieve Click Track Settings API documentation · confidence high 20/08/2026
- Get Open Tracking Settings API documentation · confidence high 20/08/2026
- Configure domain authentication Help centre · confidence medium 20/08/2026
- How to set up link branding Help centre · confidence medium 11/09/2026
See the 1 other sources ▾ Collapse ▴
- Observations in the interface, first batch Help centre · confidence medium 04/08/2026
Comparable sending platforms
Compare the whole family →Frequently asked questions
Can you turn off open tracking in Twilio SendGrid?
Does Twilio SendGrid rewrite links for click tracking?
Do your emails go through Twilio SendGrid?
The sending platform is read from the headers, not from a claim. The report names it, and says where to fix the findings with that vendor.