How long are messages tried for delivery, before expiring?

You have the option to specify for how long you would like the phone networks to retry the delivery of a message, in the event that the first attempt to deliver the message is unsuccessful.

When you send the campaign an immediate, initial delivery attempt is made.

If the initial delivery attempt is unsuccessful because the phone number is not recognised, then no further delivery attempts will be made.

If, however, the initial delivery attempt is unsuccessful because the phone is temporarily unavailable (perhaps the phone is switched off or in a poor signal reception area), then the phone networks will continue to retry for the length of the Message Validity Period.

The Message Validity Period can be set to between 1 and 72 hours. A low setting is relevant for time critical messages and a high setting is relevant for non-time critical message content.

You can set the Message Validity Period when using the TextOnline, TextCampaign and TextPremium online applications, and the Web Service and HTTPS Connector Developer Toolkit APIs.

For more information, please contact our Customer Service team on 08451 221 302.