Maximum Email Size Limit

Emails sent out of our mail servers are capped at a certain size.
For Windows server, the maximum email size is 25MB, whereas for Linux server, the maximum email size is 50MB.

It is important to ensure that the mails sent out of the server does not reach the maximum email size.
This is because when a mail is sent out of the server, it will be converted from HTML to ASCII codes and the size will increase by few MBs after the conversion.
Therefore, in order for the mails to be delivered successfully, the total mail size has to be at least 3MB below the maximum size.

If users require to send out mail with large attachments, it is recommended for them to upload the large files to services such as Google Drive, Dropbox and more.
Once the files were uploaded, the sender may send the download links to the recipients so that they can retrieve the files from their end.

When sending large emails, the sender will also need to consider the maximum email size allowed by the recipient's mail server.

  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

Disable Junk folder in MS Outlook

Some emails will fall in Spam folder due to spam-trigger words detected or some other criteria....

iOS IMAP Error "Unable to Move to Message" to Trash Folder

When configure IMAP on an Iphone IOS device, you will get the follow error when trying to delete...

Email Configuration Recommendations

There are two protocols that is frequently in use to retrieve email contents, which is POP3 and...

Migrating email contents using IMAP protocol

Email contents from old server cannot be migrated to new server especially if both servers are...

SMTP error codes for Yahoo Mail

https://help.yahoo.com/kb/smtp-error-codes-sln23996.html