What is post-send email control?
Email was designed to move a message from one mailbox to another and then stop. Once delivery succeeds, the sender has no standing in what happens next. The recipient holds a copy, can forward it, can keep it indefinitely, and can open it long after the context that justified sending it has disappeared.
Post-send control is the missing half of that transaction. Instead of handing over a file, you hand over access to a file — and access is something that can be changed.
Post-send control vs encryption
Encryption and post-send control solve different problems, and they are often confused:
- Encryption protects a document while it travels. It answers: can someone intercept this?
- Post-send control governs the document after it arrives. It answers: who can still open this tomorrow, and can I stop them?
An encrypted attachment that reaches the wrong person is still in the wrong person's hands, permanently. Post-send control is what lets you close that door.
What post-send control normally includes
- Revoking access after sending, including after the document has been opened
- Expiry, so access ends on a date or after a period
- An access record showing when a document was opened and how
- Device restrictions, limiting the document to approved devices
- Destruction, removing the document itself rather than just hiding the link
- Authenticity, so a recipient can confirm the document is the original and unaltered
Who needs it
Anyone whose documents outlive their relevance: legal teams sending memos before they are public, HR teams sending offer letters that change, founders sending decks to investors, sales teams sending proposals while terms are still moving.
How FINIS fits the category
FINIS is a document-control platform built around this idea. You upload the document, send a FINIS link, and every control above stays with you for the life of the document. Send should not mean surrender.
How FINIS handles this
FINIS is a post-send control platform for documents. You send the file as a FINIS link instead of an attachment, and the controls stay with you.
Revoke access
End access to a document after it has been sent, even after it was opened.
Auto-expire
Give the document a lifetime at the moment you send it.
Track opens
See when the document was opened and how it was accessed.
Destroy
Erase the document itself and keep a record that it was destroyed.
Device lock
Restrict the document to approved devices.
Authenticity seal
Prove the document came from you and has not been altered.
Questions
What is post-send email control?
It is the ability to govern a document after it has been sent — revoking access, expiring it, tracking opens, restricting devices, or destroying it.
Is post-send control the same as encryption?
No. Encryption protects a document in transit. Post-send control decides what the recipient can do with it after it arrives.
Does the recipient need to install anything?
No. Documents open in a browser-based secure viewer.
Does it work for documents I receive?
Yes. Summon lets you request a document through a single-use upload link so it arrives under the same controls.
Related reading
Other guides in the post-send control series.
Email recall
Why recall usually fails and what works instead.
Post-send email management
Governing documents after delivery across a team.
Common email mistakes
The errors that cause most email incidents.
Send everything. Fear nothing.
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