Email Message is Showing Exceeded Fixed Message Size

You may receive an error message when attempting to send larger emails that the email has exceeded the fixed message size:

552 Message size exceeds fixed maximum message size. Size: 10681 KB, Max size: 10000 KB.

You can rectify this by logging into your Plesk panel and following the below steps:

Click the Settings option on the left hand menu

Settings Page

Click the Mail Server Settings icon and on the Server-wide mail preferences page update the Maximum message size box then click Save when done.

Mail Preferences

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