All blogs & guides

ACCOUNT SAFETY

Mailbox Suspended by Google, Microsoft, or Your Email Platform?

By TransmitInbox team
Published July 26, 2026 · Updated October 13, 2026

The campaign stops sending, and the mailbox shows a suspension notice. Reconnecting the tool feels like the quickest fix, but it may leave the actual restriction untouched. First find out who restricted the account and which parts of the service still work.

Find out who restricted the account

For teams working across North America and Europe, put the restriction notice, UTC timestamp, account owner, and support reference in one incident log. Name a person who can respond during each team’s working hours. Don’t let an overnight handover trigger repeated reconnect attempts or new sender accounts before the provider explains what must be corrected.

A sending-platform pause, a Google Workspace Gmail suspension, and a Microsoft outbound restriction aren’t interchangeable. Save the notice and exact error, note the affected account, and check the provider's administrative console directly rather than following an unexpected email link.

• Pause scheduled campaigns and dependent automations.
• Preserve relevant logs and the last known successful send.
• Check whether the restriction affects sending, receiving, or the entire account.
• Assign an administrator to coordinate the response and avoid conflicting changes.

Check the notice inside the service that issued it before following an email link or changing credentials. A lost sequencing-tool connection and a provider’s outbound restriction are different problems. Can staff still sign in, receive messages, and reply through the mailbox’s own interface? Those answers help you work out what’s affected and keep the support conversation focused.

Check account activity and the provider notice

Review unusual sign-ins, connected apps, unexpected sending, and recent campaign changes. If compromise is suspected, contain it and follow the provider's security remediation process. Don’t simply reset a password and assume every session or third-party connection is safe.

Microsoft's restricted-user recovery guidance describes reviewing and resolving the cause before removing a sending restriction. Google's suspended Gmail guidance explains administrator recovery and cases where reactivation is unavailable. Neither process promises that every suspended account can be restored immediately.

Sit down with the administrator and look at recent sign-ins, connected apps, sending logs, imports, and permission changes. If something looks unfamiliar, follow the provider’s process for securing the account and checking sessions and integrations. A password reset may be part of the work, but it doesn’t tell you on its own that every connected application is now safe.

Keep the timeline factual. What do you know happened, and what are you still checking? A confirmed security incident needs different action from a suspected policy issue or an expired tool connection. Don’t guess the cause just to complete a support form. You want the investigation to identify what must change before campaign access returns.

Send support the details it needs

• Include the account identifier, error text, and incident time.
• Explain what activity you recognise and what looks unauthorised.
• List concrete remediation already completed.
• Ask what policy or recovery step remains unresolved; never include passwords.

Send support the notice, affected account, time, useful message identifiers, and the fixes you’ve already made. Keep customer content to the minimum needed, and leave passwords, private keys, and tokens out of the ticket. Ask whether the restriction concerns a user, the organisation, or a connection. That answer helps you avoid working on the wrong account while the actual issue remains open.

Keep the campaign paused while the provider reviews it. A support request doesn’t establish when—or whether—the account will be restored. If you’re reconsidering the service itself, our provider comparison can help you check which workflows it permits before you buy replacement accounts and create the same problem somewhere else.

Test the setup before restarting

If the planned activity violates the service's rules, change the activity or stop it. Don’t create replacement accounts to evade the restriction. After official restoration, verify ordinary sending and receiving, review permissions, and resume only permitted work under monitoring.

Keep an incident record with the cause, the evidence, and the decision to resume. Where the provider has not confirmed the cause, record that uncertainty. A warning disappearing from the campaign dashboard isn’t a substitute for an administrator's verification.

Once access returns, use test contacts you control to check the whole process. Send a message, inspect its authentication, reply to it, and test suppression. Check the sequencing connection too. Being able to log in is a good first step, but it’s not the same as being ready to run the campaign. Give any remaining error to someone who can resolve it.

Ask what will prevent a repeat of the incident. If a wider reputation problem remains, the domain recovery guide can help with that decision. Moving the same prohibited activity or insecure integration to a different account can simply move the trouble. You also risk disrupting another mailbox the business needs for customer conversations.

Common mistakes

• Confusing a platform connection error with provider suspension.
• Sharing credentials in tickets.
• Restarting on login alone.
• Moving the same unresolved activity to another account.

Before closing the incident, confirm the support outcome is recorded and the campaign owner understands any remaining restriction or required follow-up.

Get the restriction resolved, then check the cause before sending again. If your team needs help with the setup and campaign controls, a managed cold email service can help organise the checks and the next steps.