Sending Limits

Hourly Limits

When you first sign up for Mailtrap, we limit your throughput to 150 emails an hour. This is a security measure to prevent abusing our system for spam. 

You can raise the hourly limit by upgrading to a one of our paid plans, which starts at 600 or even 800 emails per hour. Later on, our automation will proactively raise your limit if you're nearing it. For an even higher limit, you can submit a request to our support team.

If you try to send more emails than your hourly limit allows, the extra emails will be queued and sent in the next hour.

Note: There are no hourly limits for Email Campaigns.

Daily Limits

We have a daily limit of 150 emails/day only for our Free plan, which lets you send up to 3,500 emails per month. Emails sent over this limit will be rejected and won't be sent.

Need to send more? Upgrade to a paid plan!

Connection Limits

The maximum number of concurrent SMTP connections per account is 10.

If you exceed this limit, you'll get the following error:

535 5.7.8 Too many connections per account

The maximum number of concurrent SMTP connections per IP is 10.

The maximum number of messages per 1 SMTP connection is 100.

If those limits are not enough, please let us know by contacting our Support Team.

Email Size

The maximum allowed size of each email message, including attachments, is 10 MB in all plans, including free.