Email clients and spam filters have learned one thing about link shorteners: spammers love them. A generic shortener domain in your email doesn't just look unprofessional — it's a measurable deliverability liability. The fix is also measurable: put your own brand on the link.
The spam-signal problem
When an inbox provider evaluates your email, every link counts. A message containing https://short.link/Ab3xK9q carries the reputation of short.link — a domain that processes links from millions of senders, including every spam campaign on earth. When a filter sees that domain in bulk mail, it gets cautious. Cautious filters mean the Promotions tab at best, spam at worst.
Your own domain has the opposite problem profile: you control it, you don't abuse it, and its reputation is yours alone.
The trust-signal solution
A branded short link looks like this:
https://go.yourbrand.com/launch24
Everything about it says "this is us": the domain is your brand, the slug is readable, and the destination is predictable. Click-through rates on branded links routinely beat generic shortener links by 20–40% in email campaigns — people click what they trust, and they trust what they recognize.
What receivers actually check
Inbox placement depends on three layers. Branded links help two of them:
- Sender authentication — SPF, DKIM and DMARC on the From domain. This is where the email's deliverability is actually decided. A shortener domain in the message body doesn't affect authentication — but it affects the next layer.
- Reputation signals — including the domains in the message. This is where generic shorteners bleed trust and branded links earn it.
- Engagement — opens, clicks, replies. Branded links lift CTR, and CTR is one of the strongest engagement signals filters use.
The SPF/DMARC/DKIM inspectors exist precisely because layer 1 is where delivery is won or lost. Run them on your From domain before you send anything.
Setting it up properly
- Pick the domain. A subdomain of your root domain (
go.yourbrand.com) inherits trust and is trivial to set up. A separate short domain (ybrnd.co) is shorter but costs a registration and needs its own reputation. - Point it at yas.sh. Add a CNAME (or A record) for the subdomain, then register it in the dashboard's custom-domain settings.
- Keep slugs human.
go.yourbrand.com/launch24beatsgo.yourbrand.com/Ab3xK9qin both trust and click-through — readable slugs tell the recipient what they're clicking before they click. - Use 302 redirects. You want every click to hit your analytics pipeline. See 301 vs 302 for why.
The click-through math
Say your campaign gets 10,000 opens:
- Generic shortener: ~3.2% CTR → 320 clicks.
- Branded link: ~4.5% CTR → 450 clicks.
That's 130 extra clicks — not from more opens, but from more trust. Then multiply by every campaign, every quarter. Branded links are one of the few marketing investments where the ROI is a setting, not a campaign.
The bottom line
Email deliverability is a reputation economy. Generic shortener domains rent someone else's reputation — usually a bad one. Branded links let you spend your own, which compounds. Configure authentication, brand your links, and let the filters see what your customers already know: the link is yours, and it's safe.