AWS End User Messaging SMS Best Practices

Publisher

Amazon Web Services

URL

https://docs.aws.amazon.com/sms-voice/latest/userguide/best-practices.html

Published

unknown

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

AWS documentation; verify licence before reuse; no-redistribution; short excerpts and locators only

Source notes citing this source

• AWS charges for an SMS once it accepts the send request, even if the recipient never receives it (for example a number no longer in service). in context
• AWS publishes daily-processed US carrier deactivation reports, retained for 90 days of date-specific objects, so senders can remove deactivated or reassigned numbers from lists. in context
• AWS advises against free link shorteners such as tinyurl.com or bitly.com because carriers tend to filter messages containing them; paid shorteners on a domain dedicated to the sender are acceptable. in context
• AWS lists restricted SMS content categories subject to heavy filtering or outright blocking: gambling, high-risk financial services, debt forgiveness, get-rich-quick schemes, illegal substances, prescription drugs, phishing, S.H.A.F.T. and third-party lead generation. in context
• AWS states that for US toll-free numbers the opt-out and opt-in keywords are set at the carrier level as STOP and UNSTOP, are the only usable keywords, and neither they nor their responses can be modified. disputed in context

Cite this source record

APA

WarmTransfer. (2026, October 2). AWS End User Messaging SMS Best Practices. WarmTransfer. https://warmtransfer.net/knowledge/sources/aws-sms-best-practices

BibTeX

@misc{warmtransfer-aws-sms-best-practices,
  title  = {AWS End User Messaging SMS Best Practices},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/aws-sms-best-practices},
  note   = {Amazon Web Services, accessed 2026-10-02}
}