Bulk SMS campaigns

Bulk SMS in HLB lets you send a one-time text to a selected group of contacts. You can use it for an event reminder, a customer update or an offer to a contact segment.

To prepare a send:

• Go to Contacts and select the contacts you want to message.
• Choose the Send SMS bulk action and select the sending phone number when required.
• Enter your message or insert reusable content, with supported personalization where appropriate.
• Review the recipients and message before confirming the send.

You can send immediately, schedule for a future date and time, or use Drip Mode to process a larger send in smaller batches. Drip Mode lets you set when processing starts, how many contacts are in each batch and how long to wait between batches.

After launch, go to Contacts, then Bulk Actions, and open the campaign's Show Stats option. Available results can include sent, delivered, failed and skipped messages. For eligible queued sends, the action menu offers controls to pause, edit the schedule or cancel remaining processing.

New parent accounts have a seven-day SMS warm-up period. The daily limit is 250 times the account's age in days during that period, from 250 on day one to 1,750 on day seven. Separately, each location has its own level-based messaging ramp starting at 500 SMS per day. If the limit is reached, the message shown includes the local reset time.

Bulk SMS is designed to skip contacts marked Do Not Disturb (DND).