10minemail Why a 10-minute inbox is enough
Ten minutes sounds stingy until you watch a real signup. You paste an address, you wait for a code, you type the code, you are done. The useful life of that address is often under three minutes. The remaining seven are slack for a slow sender.
Permanent inboxes are good at a different job. They keep receipts, password resets, and threads you might need in a year. That strength becomes a problem when every website treats an email field as a licence to write forever. Once an address is in a list, unsubscribing is extra work, and not every list honours it.
I set the default on this site to ten minutes because that is long enough for a code and short enough that the address cannot quietly become a second identity. If a sender is slow, +10 min adds another slice to the same inbox. If you need the message tomorrow, you needed a real mailbox, not a disposable one.
The timer is a product choice, not a gimmick
On the server, each inbox is a record in memory with an expiry timestamp. A background sweep deletes anything past that timestamp. There is no “check later” database. There is no login to recover an old box. When the countdown hits zero, the token in your browser points at nothing.
That design has two effects, both intended.
First, forgotten addresses cannot sit on the internet as open letterboxes. A 24-hour “temp” mail service that keeps messages on disk is still a mailbox. It is just a mailbox with a shorter marketing slogan. I did not want a pile of other people’s mail on this VPS.
Second, you are forced to be honest about the task. If ten minutes feels tight, the task may not be a one-off. A software account you will actually use, a shop you will reorder from, a community you will post in again — those are durable relationships. Put them on a mailbox you control. Read when not to use temporary mail before you paste a throwaway into a form you will need next month.
Why not one hour by default?
I tried longer windows in my head while building this. An hour is more comfortable. It is also long enough for people to treat the address like a spare Gmail. They sign up for three sites, walk away, come back after lunch, and now we are holding three strangers’ verification messages on a public pipeline.
Ten minutes pushes you to finish the job in one sitting. +10 min exists for the slow sender, not for a second career as a shadow identity. You can extend more than once. You should not build a lifestyle on extensions.
New address is the other valve. It throws the old box away immediately and issues another name. Use it when a form rejected the first local part, or when you finished one task and need a clean slate. Do not use it to spray a dozen names at the same signup. That looks like abuse to the other site and to our mail domain.
What “enough” means in the mail pipeline
Catchmail is pull-based. We do not get a webhook the instant a message lands. We poll. Polling costs a scarce request budget, so we only poll inboxes that currently have a browser listening. A tab you closed is not worth a request. That is another reason the product wants you present: live delivery is live only while you are here.
If you extend and then close the laptop, the address can still exist until expiry, but you will not see mail until you come back — and if the timer ended while you were gone, the mail is gone with it. There is no replay.
That sounds harsh. It is the same harshness as a paper cup. Fine for a drink. Wrong for storing wine.
When ten minutes is the wrong default
Government portals, banks, schools, and workplaces often send mail on a delay measured in hours, not minutes. Tax letters, payslips, and “your application is being reviewed” notes do not belong here. Neither do password resets you must be able to repeat.
Some newsletters send the download link on a drip. If the PDF arrives tomorrow, a 10-minute inbox will not help. Use a plus-alias on a real mailbox, or skip the gate.
If you are travelling and the only “ID” a Wi-Fi splash page wants is an email, ten minutes is usually plenty. If the splash page also wants a phone number, the email field is not your real problem.
How to live with a short timer
Copy the address only into the form you need right now. Do not save it in a password manager as a standing identity. Do not reuse it across sites. Watch the ring. If it is under two minutes and you still do not have mail, extend first, then wait. If you have what you need, you can close the tab and let the rest of the countdown burn.
The point of a 10-minute inbox is not to be generous. It is to be finished. For what we actually delete when the ring hits zero, see what happens when the inbox expires. To try the default, open the inbox.