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The Overview tab contains global email settings that apply across all emails sent from your workspace.

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Communication limits

Communication limits cap how many emails can be sent to a single email address within a given time period. This acts as a safeguard against accidentally over-sending — for example, if a contact is enrolled in multiple workflows or is included in several blast audiences at once. You can set limits at three cadences: Click Add limit next to a period to configure a cap.
If a contact exceeds a limit, the email will not be sent to them for that send cycle.
Individual emails can bypass these limits using the Ignore communication limits or Set as operational toggles on the email. See Delivery overrides for details.

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Per-email send cap

In addition to the workspace-level cadences above, Conversion enforces a hard cap of 3 sends of the same email to the same recipient address within an 8-hour rolling window. This cap counts rows in both Sent and Sending statuses (excluding the current row) and takes priority over your configured communication limits. This cap only applies to repeat sends of the same email (matched by email_id). Sends of different emails to the same recipient are not affected — for example, if your daily limit is 4, a recipient can still receive up to 4 different emails in a 24-hour window. When link tracking is enabled, Conversion wraps all links in your emails so that clicks are recorded and attributed back to the email. UTM parameters are also automatically appended to tracked links. Toggle Track link clicks to enable or disable this. When disabled, links are sent as-is and click activity is not tracked.
Tracked link clicks are what power the click-through rate and total unique clicks metrics visible on the Performance tab.
When link tracking is enabled, Conversion automatically appends UTM parameters to every tracked link in an email so you can attribute traffic and conversions back to the email in your downstream analytics tools.
For the three standard UTMs (utm_source, utm_medium, utm_campaign), your value always wins. If a link already includes one of these, Conversion leaves it untouched and only fills in the ones that are missing.
The internal cai_email parameter is always set, overwriting any existing value, because it’s required for click attribution.
Only http and https links receive UTMs. Other link types (for example, mailto: or tel:) are skipped, and subscription/unsubscribe management links are never tracked or modified.
If link tracking is disabled, no UTMs are applied — links are sent as-is and clicks aren’t tracked.

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Marketing topics

Marketing topics let you categorize your emails. Topics help your team stay organized across a large volume of emails. A Default topic is created automatically and applied to all emails unless you specify otherwise. To add a new topic, click Add email topic.

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Subscriptions and topic-level unsubscribes

Every recipient has a global subscription status (such as Subscribed or Unsubscribed) that controls whether they can receive marketing emails at all. In addition, recipients can unsubscribe from individual marketing topics while staying globally subscribed. These two levels behave independently:
  • A recipient’s status only becomes Unsubscribed when they toggle off the global Unsubscribe from all option.
  • Toggling off one or more individual topics — even all of them — does not change their global status. This is intentional, so the recipient can still receive emails on new topics you add in the future.
When an email is sent, Conversion skips the recipient if they are not globally subscribed, or if they have unsubscribed from that email’s specific topic. In the latter case, the email shows a “Recipient is unsubscribed from this topic” reason on the Recipients tab.

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One-click unsubscribe

Marketing emails include List-Unsubscribe and List-Unsubscribe-Post headers, allowing clients like Gmail and Apple Mail to show a built-in Unsubscribe button. Choose what that button opts the recipient out of: Use Only the email’s topic for distinct email streams whose audiences may want to manage separately. Recipients can still opt out globally from the subscription management page.
The setting is applied when the recipient clicks, so changes affect previously sent emails.
Operational emails do not include one-click unsubscribe headers, so this setting does not apply to them.