Exchange 2018 mail size
In Exchange 2018, the maximum size of a single email message is 20 MB (megabytes). This is a hard limit, meaning that if an email exceeds this size, it will not be delivered.
However, there are some exceptions and considerations to keep in mind:
- Attachments: The maximum size of an attachment is 10 MB. If an attachment exceeds this size, it will not be sent.
- Embedded images: Embedded images, such as those used in HTML emails, are limited to 1 MB in size.
- Large files: If you need to send large files, you can use the "Large File Send" feature in Exchange 2018. This feature allows you to send files up to 25 GB in size, but it requires the recipient to have a compatible email client and the file must be sent as a link, not as an attachment.
- Transport rules: You can use transport rules to bypass the 20 MB limit for specific emails or senders. However, this requires advanced Exchange administration skills and should be done with caution.
- Third-party solutions: There are third-party solutions available that can help you send larger emails, such as email archiving and storage solutions. However, these solutions may require additional infrastructure and configuration.
It's worth noting that the 20 MB limit is a security feature designed to prevent large email attachments from being sent, which can help prevent email-borne malware and viruses from spreading. If you need to send large files, it's recommended to use alternative methods, such as file transfer protocols (FTP) or cloud storage services.