> For the complete documentation index, see [llms.txt](https://postman-v1.guides.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://postman-v1.guides.gov.sg/faq.md).

# FAQ

- [Service Status](https://postman-v1.guides.gov.sg/faq/postman-uptime.md): Have questions about Postman's uptime? We aim to maintain uptime of >99.5%.
- [For Recipients](https://postman-v1.guides.gov.sg/faq/faq-recipients.md): You might be receiving emails from Postman from various government agencies. Our email address is donotreply@mail.postman.gov.sg.
- [Check Email Authenticity](https://postman-v1.guides.gov.sg/faq/faq-recipients/check-email-authenticity.md): This is what you could to do see if the email is coming from Postman.
- [For Senders](https://postman-v1.guides.gov.sg/faq/faq-sender.md)
- [Messaging Channel Comparison](https://postman-v1.guides.gov.sg/faq/faq-sender/messaging-channel-comparison.md): Here is a comparison between the various messaging channels.
- [Cost Breakdown](https://postman-v1.guides.gov.sg/faq/faq-sender/cost-breakdown.md): Postman does not charge the user. Sending emails are free. Sending SMS depends on Twilio's SMS pricing and the recipient's country code. Sending Telegram bot messages are free.