Plus-addressing or a real alias: which should you use?

What plus-addressing does

With plus-addressing, you add a tag before the @ sign: name+shopping@example.com. Supporting mail systems deliver it to name@example.com. The tag can drive filters and reveal which version received a message.

It is wonderfully convenient. There is usually nothing to create in advance, and standards describe the tag as detail attached to the underlying address.

The clue hidden in plain sight

The original address remains visible. A company—or a spammer cleaning a list—can remove everything after the plus sign and recover the base address. Some signup forms reject plus signs, and some systems strip or mishandle tags. Plus addresses are also commonly receive-only.

A tag labels the branch. It does not disguise the trunk.

What a separate alias changes

A true alias can look unrelated to the everyday address beneath it. The recipient cannot simply delete a tag to discover the base address. Each alias can have its own lifetime and can be disabled without affecting neighbouring relationships.

That makes an alias stronger for reducing correlation, isolating breaches and ending unwanted contact. The cost is management: durable accounts need durable aliases, clear labels and a recovery plan.

Choose by the job

• Use a plus tag for quick sorting where revealing the base address does not matter.
• Use a separate alias when privacy, breach tracing or the ability to cut off one route matters.
• Use a durable address for accounts you may need to recover years later.

You do not need to declare one universal winner. Use the labelled branch for organisation and the separate door for separation.