Here's the mechanical thing most marketers never see: when you turn on click tracking, the URL in your text stops pointing at your website. It points at a redirect. The recipient taps it, hits a tracking server, that server logs the click and then forwards them to the real destination. That extra hop is the whole point — it's how you get attribution. It's also exactly the pattern carriers use to decide whether a message looks like spam.
Full disclosure: I work for Ready, an SMS platform. So I spend a lot of time staring at delivery receipts and filter behavior, and this particular tradeoff — attribution vs. deliverability — is one people underestimate until a whole campaign silently underperforms and nobody can say why.
Why a redirect looks suspicious to a carrier
Carrier spam filters don't read your marketing copy and nod approvingly. They score patterns. And two patterns light up the model hard:
- A URL that redirects instead of resolving directly. Legitimate senders link to their own domain. Spammers hide the real destination behind a shortener or a tracking hop so filters can't see where the link actually goes. The problem is your tracked link does the exact same thing structurally — the carrier can't tell your CleverTap-style redirect apart from a phishing cloak by looking at it.
- A domain with a bad reputation. This is the killer. When your click tracking runs through a shared shortener domain — the default
something.lyor a pooled tracking domain your platform uses for everyone — you inherit the reputation of every other sender on that domain. One spammer using the same pool poisons the well for all of you.
I've written before about how shared bit.ly links get texts silently filtered. The tracking-redirect version of the problem is the same reputation mechanism wearing a slightly different hat.
The delivery hit is invisible, which is why it's dangerous
If your platform blocked the message outright, you'd notice. Carrier filtering rarely does that. It drops the message quietly — the recipient never sees it, and your dashboard often still shows it as "sent" or even "delivered" because the delivery receipt reflects the handoff, not what the recipient actually got.
I go deep on that gap in your 98% delivered rate is lying to you, but the short version: a green "delivered" checkmark is not proof a human saw your text. So when you flip on tracking with a shared domain, your reported metrics can look identical while your real reach quietly craters 10, 20, 30 points. You measured more precisely and delivered less. That's the trap.
The four options, ranked
Here's the honest menu, from best delivery to worst:
| Approach | Attribution quality | Delivery risk | Setup cost |
|---|---|---|---|
| Plain URL to your own domain (no tracking) | Low (UTM-only, no click data) | Lowest | None |
| Dedicated branded tracking domain | Full click tracking | Low | One-time DNS setup |
| Shared/pooled tracking domain | Full click tracking | Medium–high | None |
| Public shortener (bit.ly, tinyurl) | Basic | Highest | None |
The winner for almost everyone who wants attribution is the dedicated branded domain. It gives you the redirect (so you keep click data) but on a domain only you send from — so the reputation is yours to build and yours to protect. No inherited spam. I covered the setup and rough cost of that in the dedicated domain fix, and it's the single highest-leverage deliverability move for anyone instrumenting links.
How a dedicated domain actually fixes the reputation problem
The mechanism is boring and that's why it works. When you use go.yourbrand.com instead of bit.ly, the carrier's reputation model scores your domain based on your traffic. If you send clean, opted-in messages to engaged recipients, that domain builds a positive reputation over weeks. Nobody else can drag it down.
Contrast that with the pooled case, walked through in the carrier reputation mechanism post: you could be a perfect sender and still get filtered because someone three accounts over ran a payday-loan blast through the same domain last Tuesday.
There's a warmup element too. A brand-new tracking domain has no reputation, and carriers are cautious about domains they've never seen. Don't launch a dedicated domain into a 50,000-contact blast on day one. Ramp it — smaller sends first, engaged segments first — the same way you'd warm any new sending identity.
When to just skip tracking entirely
This is the part vendors won't tell you: sometimes the right move is no link and no tracking at all.
A few cases where I'd drop the tracked link:
- The very first message to a new contact. Putting a link — tracked or not — in the opening text is one of the fastest ways to get filtered. Carriers reward a two-message warmup. There's a whole post on why the link-in-first-message pattern trips filters. Send the intro, get a reply or an implied engagement, then send the link.
- Transactional messages (appointment confirmations, OTPs, order updates) where you don't need attribution and every point of delivery matters. Link to your bare domain or skip the link.
- Short, high-frequency ops texts where a redirect adds latency and risk for zero marketing value.
Attribution is a marketing luxury. Delivery is the whole game. If a message has to land — a two-factor code, a "your appointment is in 1 hour" — I'll take the plain URL and lose the click data every time.
The encoding tax nobody counts
One more thing that quietly compounds this. Long tracking URLs eat into your segment budget. A branded short link is compact; a full tracking URL with UTM parameters stacked on can be 80–100 characters on its own, which pushes a message past the 160-character segment boundary and starts billing you for multiple segments.
Worked example at Ready's Standard rate ($0.02/segment + $0.0045 carrier pass-through = $0.0245 all-in):
- A tidy branded link keeps a promo at 1 segment → 10,000 contacts × 1 × $0.0245 = $245.
- The same message with a bloated tracking URL spills to 2 segments → 10,000 × 2 × $0.0245 = $490.
Same campaign, double the bill, purely because the tracking string pushed you over the cliff. And if you also dropped a curly apostrophe or an emoji in there, you'd trip the unicode downgrade to 70 characters and split it further. Short branded links aren't just a deliverability play — they're a cost-control one.
What we do about it at Ready
I'll keep this brief because the point is the principle, not the pitch. Ready runs on registered 10DLC carrier routes and gives you the compliance and deliverability plumbing — automatic STOP handling, quiet-hours enforcement, litigator/DNC scrubbing — so the non-link parts of your reputation stay clean. On the link side, the honest advice is the same whether you use us or not: put tracking on a dedicated branded domain, keep the URL short, and don't link in the first message.
If you want to see the full pricing and platform, it's at tryready.com/readysms, and there are 2,500 free credits to test your own delivery before you commit a dime.
The practical takeaway
Tracking isn't free. Every tracked link is a redirect, and every redirect is a signal a carrier can read against you — especially on a shared or public shortener. But you don't have to choose between "I know nothing about clicks" and "my delivery tanks." The middle path is:
- Use a dedicated branded tracking domain — your reputation, not a pool's.
- Warm it before big blasts.
- Keep URLs short so they don't split your segments or your bill.
- Skip the link on first-touch and transactional messages where delivery matters more than attribution.
Do those four and you keep almost all of your click data while giving up almost none of your reach. Start by auditing one thing this week: pull up your last campaign and check what domain your links actually redirect through. If it's shared, that's your first fix.