Bulk SMS can be an effective way to inform your donors about your charity’s disaster relief efforts and emergency response. Here are the steps to follow:

1. Collect phone numbers: First, you need to collect the phone numbers of your donors who may be interested in supporting your disaster relief efforts. 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. Explain the situation and the impact of the disaster on the affected community. Highlight the urgent need for donations and how these donations will be used to support the emergency response efforts. Provide clear instructions on how donors can donate.
4. Personalize your message: Address your donors 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 “Donate now to support our disaster relief efforts” or “Your donation can help provide food, shelter, and medical assistance to those affected by the disaster.”
6. Provide details: Provide details about the disaster relief efforts you are undertaking, such as the type of aid being provided, the number of people being helped, and the progress of the relief efforts.
7. Schedule your message: Choose a date and time when most of your donors 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 donors.
9. Follow up: Follow up with donors who have made a donation. Thank them for their support and provide updates on the disaster relief efforts. Also, encourage them to spread the word about your charity’s emergency response efforts to their friends and family.
   Remember to respect your donors’ 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 donors feeling overwhelmed and opting-out.