Sending Limits

Hourly Limits

When you first sign up for Mailtrap Email Sending and verify a domain, we limit your throughput to 200 emails an hour. This is a security measure to prevent abusing our system for spam. 

The good news is you can always 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 and have good sending stats. For an even higher limit, you can submit a request to our support team, which is typically processed within two business days.

If you try to send more emails than your hourly limit allows, the extra emails will be queued and sent in the next hour. This means the limit doesn’t prevent you from sending more emails overall - it simply distributes their delivery more evenly over time.

Daily Limits

Our free plan lets you send up to 200 emails per day. Emails sent over this limit will be rejected and won't be sent. Need to send more? Upgrading to a paid plan is a great way to lift the daily limit!

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.