Updated: October 2026
People worry about lock-in. It is a fair concern. Here is exactly what happens to your mailboxes if you cancel ColdSend, and what you should do beforehand.
What You Actually Own
ColdSend runs the infrastructure for you: managed Azure resources are assigned automatically when you sign up — the pre-warmed Azure IP pool, mailbox provisioning, and deliverability monitoring all sit on our side. Your purchase is the service.
This means when you cancel:
- The domains are yours (you bought them).
- Imported inboxes (Gmail, Outlook, SMTP accounts you brought) were always yours.
- ColdSend-provisioned mailboxes stay exportable while your subscription is active — after cancellation, you lose access to them.
If you connected your own Azure account or tenant, it remains yours — ColdSend's automation ran on top of infrastructure Microsoft bills either way. The managed environment we assign when you sign up is ours to run; the data accounts for inboxes you hooked up directly are yours regardless.
What Stops Working
When you cancel ColdSend, the following stops:
- ColdSend's sequencer. You can no longer log into coldsend.pro to send campaigns.
- Automation. Inbox creation, DNS management, and bulk provisioning stop.
- SMTP Export relay and bulk CSV credentials that route through smtp.coldsend.pro. These are deactivated for any inbox we provisioned for you. The gateway will reject authentication after cancellation.
- Managed mailbox access. ColdSend-provisioned mailboxes run on infrastructure assigned automatically to your plan. Your subscription is what keeps those mailboxes alive — once it lapses, you lose access to them.
- Support. We no longer answer your questions.
What Keeps Working
What keeps working depends on your inbox type:
For imported Workspace inboxes (Gmail, Outlook, SMTP):
- Your inboxes remain fully functional in their original provider.
- Your SMTP and IMAP access continue to work directly with Google, Microsoft, or your SMTP host.
- ColdSend was only the sequencer — removing it does not touch your inboxes.
For ColdSend-provisioned Azure inboxes (on managed infrastructure):
- You lose access to these mailboxes once your subscription lapses. The managed Azure environment behind them is assigned automatically with your subscription and unwound when it ends.
- The sending relay (smtp.coldsend.pro) is gated by your subscription and will reject auth after cancellation.
- The bulk CSV export and SMTP Export credentials both route through this relay and will fail auth.
- If you need sending continuity, contact us before you cancel: we can retain a dedicated sending instance for you, billed separately.
If you connected your own Azure tenant (independent of ColdSend):
- If you connected an Azure tenant of your own, it remains fully yours — billable to you, independent of ColdSend.
- Your inboxes remain in your Azure Communication Services resource.
- You can manage them directly in the Azure portal.
- Your Azure tenant stays active as long as you pay Microsoft.
- Your domains and DNS records remain configured as you set them.
How to Export Before Canceling
Do this before you cancel. Afterward, you lose access to ColdSend's export tools.
Step 1: Bulk export all inboxes
- Go to Sender Accounts in ColdSend.
- Select all inboxes.
- Click Actions → Export.
- Save the CSV file securely.
The CSV contains different fields depending on inbox type:
For ColdSend-provisioned inboxes:
- Email address
- App password (freshly generated for SMTP export, shown once)
- SMTP server:
smtp.coldsend.pro - SMTP port:
587(STARTTLS) - IMAP server:
mail.coldsend.pro - IMAP port:
993(SSL/TLS)
For imported Workspace inboxes:
- Email address
- Mailbox password (decrypted stored password)
- SMTP server: provider-specific (e.g.,
smtp.gmail.com) - SMTP port:
587(STARTTLS) - IMAP server: provider-specific (e.g.,
imap.gmail.com) - IMAP port:
993(SSL/TLS)
Step 2: Save SMTP Export credentials
If you enabled SMTP Export on individual inboxes, save those credentials for reference. Note: these are relay passwords for smtp.coldsend.pro and are only usable while your subscription is active. Exporting them is useful for backup or audit, not for continued sending after cancellation.
Step 3: Note your DNS settings
If you plan to manage the domains yourself later, record your current SPF, DKIM, and DMARC records. These are configured at your registrar or DNS provider, not in ColdSend.
How to Keep Using Your Inboxes
Option 1: Use imported inboxes in another sequencer
If you imported Gmail, Outlook, or SMTP inboxes, you can reconnect them to Smartlead, Instantly, or any other tool immediately. Use the provider-specific SMTP/IMAP settings from your export.
Option 2: Export, then move to a retained instance
Before you cancel, export your credentials and mailbox data from Sender Accounts. After cancellation, access to ColdSend-provisioned mailboxes ends — the smtp.coldsend.pro relay and the provisioned IMAP endpoint stop authenticating with your subscription — so plan your migration while the subscription is still active.
You can read replies via IMAP while the subscription is active, but do not plan around continued sending through our relay; the relay is subscription-gated.
If you need the sending environment to survive cancellation, talk to us first — see the next option.
Option 3: Retain a dedicated sending instance, billed separately
If you connected your own Azure ACS tenant and have been managing inboxes there, access it directly in the Azure portal — that tenant and everything in it remains yours and is unaffected by cancellation. This requires Azure knowledge but gives you full control.
If your mailboxes were provisioned by ColdSend on our managed infrastructure and you want continuity, talk to us before you cancel: we can retain a dedicated sending instance for you, billed separately. It never appears as a plan option at signup — it is an exit arrangement, priced on a case by case basis.
Option 4: Let them sit
If you are done with the inboxes entirely, let the provisioned accounts go inactive with your subscription. There is no penalty.
If You Only Used Imported Inboxes
If you only used imported inboxes (your own Gmail, Outlook, or SMTP accounts), nothing changes when you cancel ColdSend. Those inboxes were always yours. ColdSend was just the sequencer.
You can reconnect them to any other tool immediately.
Bottom Line
Canceling ColdSend removes our automation layer and our SMTP relay access — and ColdSend-provisioned mailboxes end with your subscription. You lose access to them once it lapses.
Your own pieces stay yours: your domains, your imported inboxes, and any Azure tenant or account you connected yourself. For ColdSend-provisioned inboxes, your options are: export everything before canceling and move on, let them go inactive with your subscription, or talk to us first — we can retain a dedicated sending instance for you, billed separately.
Our relay is a convenience feature tied to your subscription — your data and your imported inboxes remain fully yours, and provisioned mailboxes stay exportable while the subscription is active.
Questions about migration or account ownership? Contact us before you cancel and we will walk you through the export process.
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