A delivery receipt, usually called a DLR, is the confirmation that comes back from the carrier saying whether a text was delivered to the recipient's phone. It's a small piece of data with outsized importance, because it's the closest thing you have to visibility into whether your messages are actually arriving. Here's what a DLR tells you, what it doesn't, and how to use it.
What is a delivery receipt?
When you send a text, the carrier can return a status, delivered, failed, or undelivered, and that status is the DLR. It's the system's report card on each message, letting your platform show delivery rates rather than just send counts. Without DLRs you'd only know you sent a message, not whether it landed, so they're the mechanism that turns deliverability from an invisible mystery into something you can partly measure.
What does a DLR tell you, and what doesn't it?
It tells you delivery status; it doesn't tell you engagement. A DLR confirms a message reached the phone, but not whether it was read or acted on, and it doesn't always capture silent carrier filtering, some filtered messages may show as delivered or return ambiguous statuses. So DLRs are a strong signal but not a perfect one: a healthy delivery rate is reassuring, and a falling one is a clear warning, but a good DLR rate alone doesn't guarantee everything's landing where it should. Read it alongside your engagement numbers.
Why do DLRs matter for campaigns?
Because they're the first place to look when something's wrong. When engagement drops, comparing your delivery rate before and after tells you fast whether the problem is deliverability or something downstream like message quality. A drop in DLR delivery rate points straight at a registration, content, or reputation issue; steady delivery with falling engagement points at the message instead. Using delivery data to diagnose is how you avoid rewriting good copy when the real problem is that messages aren't arriving.
Frequently asked questions
What is a delivery receipt (DLR)?
The carrier's confirmation of whether a text was delivered, failed, or undelivered. It's the status report on each message that lets platforms show delivery rates instead of just send counts.
Does a DLR mean the message was read?
No. A DLR confirms delivery to the phone, not that the message was read or acted on. And it doesn't always capture silent filtering, so read delivery data alongside engagement.
Why do delivery receipts matter?
Because they're the first diagnostic when engagement drops. A falling delivery rate points at a deliverability problem (registration, content, reputation), while steady delivery with falling engagement points at the message.
Keep reading: what is SMS deliverability? and why political texts get filtered. For carrier registration, see The Campaign Registry.