Sending limits help to protect Proton Mail’s IP reputation and ensure all messages sent from Proton Mail(new window) are delivered to your recipient’s inbox — not their spam folder
- If you are on a Proton Free plan, you have a sending limit of 50 emails an hour, and a total of 150 emails per day.
- If you are on a paid plan, your sending limit will change based on the reputation of your Proton Mail account (explained below). However, the maximum number of recipients you can add to an email is 100.
Ten recipients (any email address added to To, CC, and BCC fields) for an email counts as 10 unique emails.
Keep in mind that Proton Mail is not designed for bulk mailing and that sending spam is a violation of Proton Mail’s terms and conditions(new window), making your account subject to review and possible termination.
Please also note that the sending limit does not affect inbound mails (which are unlimited).
Sending limit warnings
Hourly limits
There are two possible hourly limits that you can reach. Once the limit is reached, please wait for one hour before sending again.
- Hourly external limit reached
- Hourly external BCC sending limit reached
Daily limits
- Daily external limit reached
- Daily external BCC sending limit reached
Spam detection warning
In addition to hourly and daily sending limits, Proton Mail uses a smart spam detection system to immediately halt sending from suspicious accounts.
- You are temporarily banned from sending because of spammy or undeliverable emails
You will be unable to send from your account for up to 48 hours (at our discretion). If you continue to receive this warning, your account will go under review for suspension.
If you believe you have received this warning in error, please fill in our bug report form(new window).
How account reputation affects your sending limit
In special cases, some accounts may have a lower sending limit than the default. For example, if you have a new email address that hasn’t built up a good reputation yet.
Until the account builds up a good reputation, we recommend you avoid sending email in bulk and using the BCC option too often.
Guidelines
A combination of factors can affect your sending limits. Here are some helpful tips to ensure you avoid hitting the limits:
- Start using your email address — the more you use it, the higher your sending limits will become.
- Encourage your friends to join Proton Mail — sending emails to other Proton Mail addresses has much higher sending limits.
- Don’t send spam — ensure you are only sending to individuals you know or are expecting an email from you.
- Avoid sending to undeliverable addresses.
- Avoid excessive use of BCC.
- Ensure all account information is up-to-date in your account settings.
As a seasoned expert in email communication and security protocols, I bring a wealth of knowledge and hands-on experience in the intricate workings of email service providers, particularly Proton Mail. My expertise is grounded in a comprehensive understanding of the technical nuances that govern email delivery, spam prevention, and the delicate balance required to maintain a positive IP reputation.
Now, let's delve into the details of the Proton Mail sending limits and related concepts outlined in the provided article:
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Sending Limits on Proton Mail:
- Proton Free Plan: Users on the Free plan have a sending limit of 50 emails per hour and a total of 150 emails per day.
- Paid Plans: Sending limits for paid plans vary based on the reputation of the Proton Mail account.
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Recipient Limits:
- The maximum number of recipients allowed in an email is 100.
- Each recipient (whether in To, CC, or BCC fields) counts as one unique email.
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Bulk Mailing Warning:
- Proton Mail explicitly states that it is not designed for bulk mailing.
- Sending spam is a violation of Proton Mail’s terms and conditions, which may lead to an account review and possible termination.
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Inbound Mail:
- The sending limit does not affect inbound mails, which are unlimited.
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Sending Limit Warnings:
- Hourly Limits: Users may encounter hourly limits, and if reached, they should wait for one hour before sending again.
- Hourly External Limit: There is a separate hourly external limit, and the same goes for external BCC sending.
- Daily Limits: Similar to hourly limits, there are daily limits with separate counts for external and external BCC sending.
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Spam Detection System:
- Proton Mail employs a smart spam detection system that can immediately halt sending from suspicious accounts.
- Users may be temporarily banned from sending if their account is flagged for spammy or undeliverable emails.
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Account Reputation and Sending Limits:
- Accounts with a lower sending limit than the default may exist in special cases, such as new email addresses without a good reputation.
- It is advisable for such accounts to avoid bulk emailing and excessive use of BCC until a good reputation is established.
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Guidelines for Avoiding Sending Limits:
- Regularly use your email address to increase sending limits.
- Encourage friends to join Proton Mail, as sending emails to other Proton Mail addresses has higher sending limits.
- Strictly avoid sending spam, and ensure emails are sent to known recipients.
- Minimize sending to undeliverable addresses and refrain from excessive use of BCC.
- Keep all account information up-to-date in the account settings.
In conclusion, adherence to Proton Mail's guidelines and an understanding of the factors influencing sending limits are crucial for users to maintain a positive account reputation and ensure the smooth delivery of their emails.
