Reply From Your Alias, Without Revealing Your Real Address

Reply from your own mail app (Plus and Pro)

• A message forwarded to a Plus or Pro account carries a private reply address, unique to that message.
• Hit Reply in Gmail, Outlook, Apple Mail or any other mail app, write your answer, and send it as usual.
• Emcognito sends it on with the alias as the sender and removes your own address and your mail provider's routing headers. The recipient sees the alias.
• Each reply uses one send from your monthly allowance and counts toward a daily reply limit.
• The reply address in a forwarded message works for 365 days, or until you pause or delete the alias.

Reply securely from your delivery log

• Open your delivery log, find the delivered message you want to answer, and choose Reply securely.
• You are signed in when you write it, so the reply is authorised by your session.
• Emcognito sends it with the alias as the sender. Your real address is not in the From line the recipient gets.
• Eligible messages are the delivered ones from the last 7 days.

Why a mail-app reply is safe to accept

• A From address can be forged, so on its own it proves nothing. We do not rely on it.
• A reply is accepted only when it comes from the address you sign in with: the envelope sender must match it, your provider's SPF check must pass, and the message must carry a DKIM signature aligned with your address's domain.
• Anything that fails those checks is refused at once, during delivery, with a message your mail app shows you. Nothing is queued and nothing waits on a review.
• Knowing an alias, or even one of its reply addresses, is not enough to send mail as it.

What it costs

• Replying from your own mail app is a Plus and Pro feature. On Free, a mail-app reply is refused with a message saying so.
• Until November 3, 2026, replying from the delivery log is included on every plan, Free included. From that date it is a Plus and Pro feature.
• A reply counts as one send against your monthly allowance, the same as a forwarded message does.
• Composing a brand-new message from an alias, rather than answering one, is also a Plus and Pro feature.

When a reply will not go out

• You replied from your mail app on Free. It is refused with an upgrade message; Reply securely in the delivery log still works until November 3, 2026.
• You replied from a different address than the one you sign in with, or your mail provider does not sign your mail with DKIM for your own domain. It is refused; use Reply securely instead.
• The reply address is more than 365 days old, or the alias is paused or deleted.
• The message was forwarded before mail-app reply was turned on. Those carry no reply address; use Reply securely instead.
• You are out of monthly sends or have hit the daily reply limit. A mail-app reply is refused with a message saying which.

Why this is worth saying out loud

An alias that can only receive is half an address. If a seller, a landlord, or a support desk writes back and you cannot answer without breaking cover, the alias stops being useful at exactly the moment it mattered. This page exists so nobody has to guess which reply path works on which plan, which part is free until November 3, 2026, and which part is paid.