# Own SMTP and Email Sending Limits When we talk about a private SMTP, we are referring to the email server provided by your hosting provider or contracted by you yourself. This server allows sending messages in an authenticated manner, but always within the rules imposed by the provider. ## Why are sending limits in place? Providers set limits to: * Prevent abusive use (sending spam). * Protect the IP/domain reputation. * Maintain server stability. In practice, if a provider limits to 100 sends per hour/day, any attempt to exceed that will result in blocking, failure, or delay in sending. ## Bulk sending Bulk sends (like newsletters to thousands of contacts) are generally not allowed on common SMTP servers. This is because identical emails sent to many recipients raise suspicion of spam and can harm all the provider's customers. ## How to send in bulk correctly If you need to send campaigns to thousands of contacts, the ideal is to use a provider specialized in blasts such as: * Amazon SES This service was made to handle high volume, deliverability, and sending reputation. {% content-ref url="/pages/900d0aec0d8fa5972b79ec89545308ac534ad8f9" %} [AWS SES](/en/topics/settings/email/aws-ses.md) {% endcontent-ref %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sprinthub.com/en/topics/settings/email/setting-up-your-own-smtp/own-smtp-and-email-sending-limits.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.