Booster for e-mail campaigns

Intro

Booster is a tool that enables automatic follow-up messaging within a campaign. Available in the MessageFlow panel, it lets you schedule automated messages to be sent within a specific timeframe (from 2 hours up to 7 days) to recipients who didn’t open the original message. Booster can be used with Email, SMS, and PUSH campaigns.

For Email campaigns, Booster allows you to send an additional SMS or Email. Please note: the Booster feature is not available for A/B test campaigns.

Example use case

You’re launching an Email campaign promoting products with a discount that ends in 7 days. After the initial send, you receive a performance report. Three days before the promotion ends, an automatically scheduled follow-up SMS or Email is sent to those who didn’t open the first message.

Billing

Messages sent as part of a campaign with Booster enabled are billed according to your account settings and existing contract. All Booster-sent SMS and Emails appear under the Campaign tab with the name “Booster for....”.

Where to find Booster in email campaigns

You can enable Booster during the final step of setting up your Email campaign — the summary stage. The Booster function is turned off by default and must be activated manually.

Access and permissions

If your account does not include SMS capabilities, the Booster option will be greyed out. A message will prompt you to contact our sales team to unlock the feature.

Audience selection

Booster messages are targeted at users from the original campaign audience who, within a defined window (2 hours to 7 days), did not open or click the original message.

Importantly, contacts are selected just before the Booster send. If a recipient opens the original message shortly before the Booster is scheduled, gets deleted, or is blocked — they will be excluded.

The list of contacts who received the Booster is not visible in the Groups section. You can find this data in the campaign report.

Booster eligibility based on main campaign status

Main channel	Status	Booster channel	Booster delivery
email	HARDBOUNCE	email	Not sent
email	HARDBOUNCE	SMS	Possible
email	SOFTBOUNCE	email	Possible
email	SOFTBOUNCE	SMS	Possible
email	SPAMBOUNCE	email	Not sent
email	SPAMBOUNCE	SMS	Possible

Booster messages will not be sent to:

• Recipients who opened or clicked the main campaign message

• Deleted contacts

• Blocked contacts

• Contacts without a phone number

• Groups with 0 contacts

• Groups with 100% open rate for the main campaign (you’ll be notified if Booster gets cancelled for this reason)

• Contacts marked as "Spambounce" after the main Email campaign (applies to Email→ Email follow-ups)

Unsubscribe link

Unsubscribing from a Booster campaign works the same way as with other campaign types.