Email Sending Ranges & Provider Limits

Last updated: January 30, 2026

The Email Sending Range settings give you full control over your email strategy by allowing you to configure custom daily sending ranges for each individual mailbox — both integrated mailboxes and AI Email Service mailboxes.

This flexibility helps you optimize deliverability while staying within your email provider’s limits.

Where to Find Email Sending Range Settings

You can find the Email Sending Range settings in the Mailboxes tab.

From there, simply select a specific mailbox to view and adjust its sending range.

Email Sending Limits by Mailbox Type

Integrated Mailboxes

  • The sending range is initially based on your current email limits per account.

  • You can adjust the range as needed, up to 300 emails per mailbox per day.

AI Email Service Mailboxes

  • Each AI mailbox can send a maximum of 25 emails per day after the warmup period is complete.

  • Once warmed up, you can customize the sending limit within the 25-emails-per-day range.

How Email Sending Ranges Work

  • The sending range for each integrated mailbox can be set anywhere between 0 and 300 emails per day.

  • Each day, Buzz will randomly select a number of emails to send within the configured range and will not exceed that number.

📌 Note:

Your actual sending capacity is ultimately determined by your email provider. If a mailbox is connected to multiple accounts, the total number of emails sent will depend on your provider’s policies.

Email Provider Sending Limits (For Reference)

This information is for reference only and may change as email service providers update their policies. For the most accurate details, check with your specific provider.

  • Google:

    • Free Gmail accounts: Up to 500 emails per day

    • Paid Google Workspace accounts: Up to 2000 emails per day

  • Microsoft Outlook:

    • Microsoft does not publicly disclose exact limits, but verified accounts with good reputations typically have a cap of around 300 emails per day.

    • New or low-reputation accounts may have stricter limits (10-100 emails per day). So, even if you have set a 200-250 sending range in Buzz, you new or low-reputation Outlook account is likely to send no more than 100 emails.

    • Limits reset on a rolling 24-hour basis, with a maximum of 100 recipients per email.

To optimize your email-sending strategy, review your email provider’s daily sending limits, set an optimal sending range for each of your connected mailboxes, and configure your Buzz settings accordingly.

Best Practices

To optimize your email-sending strategy:

  • Review your email provider’s daily sending limits

  • Set appropriate sending ranges for each connected mailbox

  • Adjust your Buzz settings to match your provider’s policies