Use Case : Customer needs to import all emails along with attachment from their Gmail account into their Salesforce org.

Problem: Currently, there is no way to mass-import emails within the Salesforce User Interface

Resolution: We are going to export email into MBOX format.Then using python script we will generate CSV and using data loader we will insert email into Email Message object in salesforce.

Prerequisite:

1.Python 3.X should be installed in Local system.

2.Data loader.

Step 1: 

• Go to https://takeout.google.com/
• Sign In to Gmail Account to extract Email.
• Check Mail and select the labels to extract all the related Emails.

• 

  Click create Archive to download MBOX file.

  

Step 2:

• Place the MBOX file and Python script in a same folder.
• /*** Rename the MBOX file to Sample.mbox***/.
• Get python script from this Github link Python Script

• 

  Run the Python script using Terminal or IDLE.
• we will get 2 CSV files ( emailMessage.csv, attachment.csv ) as output along with all the attachment files.
• Message-Id column in  emailMessage.csv will act as unique id for each message.
• If there is any attachment, we can find in  attachment.csv file. Each attachment will have message Id to signify this attachment belong to which email.

Point to Note :

In attachment.csv file, Body column prepend the current file path with file name(already present).

eg :

Step 3:

• Create Custom Fields in Email Message object to store Message-Id.
• Insert emailMessage.csv using Data loader into salesforce.
•  In success.csv file we can get Message-Id and corresponding Salesforce record Id.
• In attachment.csv file get the parent id based on Message-Id using VLOOKUP.
• Insert attachment.csv using data loader.
• we can find Attachment under Email Message related List.