Bulk SMS can be an effective way to inform your donors about your charity’s volunteer opportunities and recruitment. Here are the steps to follow:

1. Collect phone numbers: First, you need to collect the phone numbers of your supporters who may be interested in volunteering for your charity. Make sure you have their permission to contact them via SMS.
2. Choose a bulk SMS service: There are several bulk SMS services available online. Choose one that fits your needs and budget.
3. Compose your message: Keep your message brief and to the point. Highlight the benefits of volunteering for your charity, such as making a difference in the community, gaining new skills and experiences, and meeting like-minded people. Provide clear instructions on how supporters can sign up to volunteer.
4. Personalize your message: Address your supporters by their name in the message. This will make them feel more connected to your charity.
5. Include a call-to-action: Include a call-to-action in your message, such as “Join our volunteer team and make a difference in the community” or “Sign up to volunteer and gain new skills and experiences.”
6. Provide details: Provide details about the volunteer opportunities available, such as the time commitment required, the skills needed, and the benefits of volunteering.
7. Schedule your message: Choose a date and time when most of your supporters are likely to be available to receive the message.
8. Send the message: Once you have composed and scheduled your message, send it to your supporters.
9. Follow up: Follow up with supporters who have expressed interest in volunteering. Provide more information about the volunteer opportunities available, answer any questions they may have, and encourage them to sign up.
   Remember to respect your supporters’ privacy and preferences. If they opt-out of receiving SMS messages, make sure you remove their phone number from your list. Also, avoid sending too many messages as it may lead to supporters feeling overwhelmed and opting-out.