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• Email size alert: You can set a message size limit, beyond which the system will alert you.
• Enable web library: this feature allows recipients to see messages in the public web library. Click on "View web library" to view the list of messages that will be viewed by the recipients. 
  
  •  The list of messages that are available in the web library can be edited from the menu Messages > Saved. Email messages listed there are published in the web library by default. To archive them, thus removing them from the web library, check the box left of the messages and click on "Archive" at the bottom of the page.
• Tracking: enables message tracking by the system.
  
  •  Link tracking parameters: insert link tracking parameters to be added to every link. They must be added without the leading question mark.
  •  Tracking code: you can create ConversionLab campaigns directly from within your MailUp admin console. The tracking code for the integration with ConversionLab can be obtained from the ConversionLab "Configure" menu
  •  More useful content on this topic from our Knowledge Base: How can I track whether an email campaign triggered sign-ups, purchases, page visits, or other activity that follows a click on a link? - Tracking campaign results with Google Analytics (or any other Web analytics application)
• Content type: Select whether to create your messages in HTML language or just a text version. Note that text only versions do not allow tracking of opens and clicks.
  
  •  Multipart option: creates a text-only version of the message that will be viewed by recipients whose systems do not support HTML or use the text-only version by default. Check the box to enable the option.
• Unsubscribe confirmation message: Each time a user unsubscribes, the system will send him a confirmation message, to inform that the unsubscription was successful. 
• Envelope-sender (return-path): the email address that will receive bounced addresses.

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