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What are the size limits on email attachments?

Email attachments sent through DNN4Less SMTP server are limited to a total of 20MB, for any single email. Any email with attachments in excess of this limit, will be rejected.

Customers needing to send attachments larger than this, are advised to compress large files to within this limit; or to split the attachment into several part and to send each part in a separate email.


This limit applies to the total size of all attachments. For example, two files of 10MB each will be within the limit, while an email with files of 10MB and 11MB (totaling 21MB) will be rejected.

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  1. Senior Engineer Jessie

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