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Why Can't I Send My Message With an Attachment?

Article Rating: 1 / 5 Votes: 15

Generally, this is due to the attachment exceeding the allowed size restrictions - which are as follows:

  • nsMail™ (all email other than nsMail™ Pro) allows a total of 20MB.
  • nsMail™ Pro (business email) allows a total of 50MB.

If you are sending a compressed or zipped file, it should be no larger than 5MB and the total message including attachments and header should be no more than 20MB.

If your attachment does not exceed this size, you should check your Anti-Virus settings to make sure the attachment is not being flagged as harmful and being removed when downloaded to your computer.

Note: When you send attachments via e-mail, the messages need to be encoded to be accepted by the receiving system. The encoding process adds approximately 33% to the total size of the message. For example, a 14 MB message (text and attachments) will total approximately 18 MB once it is encoded for transmission. Some types of attachments are encoded less efficiently so results may vary. Generally, a message of 14 MB or less should pass through with no problems, provided that the message does not cause your e-mailbox to exceed the maximum e-mailbox quota.


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