Short Links in Email

Email is the channel where link domains matter most — hover previews expose every URL before a click, and spam filters evaluate every domain in the message body.

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Definition

Short links in email are compact, tracked URLs used as call-to-action links and inline references in email campaigns, newsletters and transactional communications. They affect three things simultaneously: deliverability (through link domain reputation signals evaluated by spam filters), recipient trust (through hover preview domain display in email clients) and click measurement (providing independent analytics data separate from the ESP's own tracking).

How Email Clients Display Link Domains

In most desktop email clients and many webmail interfaces, hovering over a hyperlink displays the underlying URL in the browser's status bar or a tooltip. Recipients who check hover previews — a common security behaviour in corporate and B2B environments — see the link's domain before deciding whether to click.

Three link types and what recipients see:

In B2B email specifically, where recipients are security-conscious and hover-check links routinely, branded short links in hover previews contribute meaningfully to click-through rate.

Deliverability: Domain Reputation in Email Spam Filters

As covered in Email Deliverability & Links, spam filters evaluate link domains as reputation signals. Generic shared shortener domains carry shared reputation risk. Branded custom domains carry only the sending organisation's own reputation — no cross-contamination from other users' spam.

Specific email spam filter behaviours relevant to short links:

• Blocklist checking. Link domains are checked against spam and phishing blocklists. Known generic shortener domains used in past spam campaigns may be pre-scored negatively.
• Domain age. A newly registered custom domain (less than 30 days old) may score lower than an established domain. Warm up new branded domains before high-volume campaigns.
• Domain-From address alignment. A link domain that matches or is a subdomain of the sending domain scores better than a link domain that is entirely unrelated to the sender identity.

ESP Link Tracking Interaction

Most ESPs wrap every link in a sent email with their own click tracking redirect. If a Cuttly branded short link is used as the link in the email, and the ESP's link tracking is active, the full click path is:

Recipient clicks → ESP tracking URL → Cuttly short link redirect → destination

Both tracking systems record the click. The ESP counts a click in its analytics; Cuttly counts a click in its analytics. Both are slightly overcounted — email security scanners trigger both tracking points before any human reads the email.

Options for clean single-layer tracking:

• Disable ESP click tracking for links that are already Cuttly short links — Cuttly handles the tracking, the ESP's tracking wrap is redundant.
• Configure a custom tracking domain in the ESP — this makes the ESP's tracking wrap use your branded domain, so the link path uses your domain at both tracking layers.

Independent Analytics Value

ESP analytics reports clicks within the ESP's system. Cuttly analytics reports clicks at the link level independently. For marketers using multiple ESPs, switching ESPs mid-campaign, or wanting analytics that persist after an ESP subscription ends, Cuttly's independent link analytics provide continuity and portability that no ESP's native analytics can.

Related Terms

• Email Deliverability & Links
• Branded Links
• Bot Click Detection
• UTM Parameters
• DMARC / DKIM / SPF