Temp email for public WiFi and captive portal logins
Public WiFi portals almost always ask for your email before they let you connect. Hotels, airports, coffee chains, conference centers — the form design varies, the ask doesn't. The WiFi doesn't need your specific email address to route your traffic. The venue needs it to build a marketing list.
A throwaway email address fits this situation exactly. You get past the gate. The venue gets a dead end in their CRM.
What the captive portal is actually doing
The "enter your email to connect" screen is a consent gate dressed as authentication. Submitting the form typically means you've agreed to receive communications from the operator and, often, their partners — it says so in the fine print nobody reads below the "Connect" button.
Hotel chains are the most aggressive about this. Your email at one property gets loaded into a central loyalty database shared across every property in the chain. You didn't earn points. You'll still get promotional emails from properties you've never visited. Airport operators hand their lists to travel partners: credit card programs, lounge memberships, ground transport services. The data leaves the airport the moment you click connect.
Coffee chains run the same playbook. Use the free WiFi once and the address goes directly into their CRM, matched against their app's marketing segments even if you've never downloaded the app. That's why you started getting discount emails after a single WiFi session.
Which venues follow up the hardest
Not every captive portal is equally aggressive. Here's what the follow-up pattern looks like by venue type:
Hotel chains: Almost always follow up. The address gets indexed against your stay date in a central system. Expect weekly promotional emails from the brand, not just the property you visited.
Airports: Variable but often bad. Some airports run their own loyalty scheme and mail constantly. Others sell the list to a travel data broker within days of collection.
Coffee and fast-food chains: Weekly to monthly. The address integrates directly with their CRM and seasonal campaign workflows.
Conference centers: High risk if there's a conference in the building. Event sponsors often negotiate for attendee email lists, and the WiFi signup is one mechanism for collecting them. The venue's WiFi terms may authorize this even if the conference registration didn't.
Retail stores: Aggressive. Department store and flagship retail WiFi signups feed purchase-behavior databases, matched against loyalty programs even without an explicit account link.
Transit and subway systems: Relatively clean. Most metropolitan transit WiFi logs addresses for legal session compliance but doesn't have the infrastructure to run email campaigns.
Using a throwaway address in the captive portal flow
On a phone, this takes under a minute. Open cybertemp.xyz on mobile data before the portal intercepts your traffic — or just before you connect to the network. CyberTemp generates a working inbox address immediately, no account required. Copy that address.
Go to the captive portal's email field. Paste the throwaway address and submit. If the portal sends a verification link or OTP code, go back to cybertemp.xyz, check the inbox — mail arrives in a few seconds — click the link or copy the code, and you're through.
Most portals don't send any verification. They log the address, redirect you to a splash page, and connect you. In those cases you never need to open the inbox at all. The venue has recorded a dead end and you have working WiFi.
The per-venue naming pattern
If you do this regularly, a consistent naming pattern lets you know which address is connected to which venue — and tells you immediately if one of them ends up on a list it shouldn't be on.
CyberTemp lets you set the local part of the address to whatever you want. The inbox gets created the first time mail arrives at that address — there's no pre-registration step. Useful shapes:
[email protected]— property and city[email protected]— location and use[email protected]— chain with a year suffix for rotation[email protected]— event-scoped throwaway
If [email protected] starts getting emails from a vacation package service you've never heard of, you know which hotel sold the list. That's the same principle behind tracking which sites share your contact data — applied passively, without setting up anything in advance. The per-service burner pattern described in using temp email for free trials works just as well for WiFi logins.
When the portal actually needs to reach you
A few cases where the captive portal sends something you genuinely need:
OTP-gated portals. Enterprise hotel portals — especially in conference properties — require you to click a verification link or enter a code before your session activates. The throwaway handles this fine. Go to cybertemp.xyz after submitting your address, wait a few seconds, and the code or link is there.
Session-expiry reconnect links. Some portals — common in airports and business lounges — expire your session every 24 hours and email a link to renew it. If you're staying multiple days, keep the CyberTemp tab open. The address stays active and the reconnect link lands there when you need it.
Paid WiFi receipts. If you pay for premium access at an airport lounge or hotel, the receipt comes to whatever address you used. A throwaway works fine — the receipt has the amount and date if you need it for expenses. You don't need the email address to remain active after the session ends.
In every case, the inbox at cybertemp.xyz handles what you need and nothing follows you afterward.
For public WiFi signups and similar email gates, the workflow is: open cybertemp.xyz on your phone, type a venue-specific address like [email protected], paste it into the portal, and check the inbox in the browser if a verification step comes back. No app to install, no account to create. The venue gets what their form requires; your real inbox stays out of their CRM entirely.