This dataset contains emails for spam or ham classification. It's from "Enron-Spam datasets". This dataset contains 6 pre-processed(by author) form sets from Enron1 to Enron6, There are two files:

1. email_origin.csv: Original pre-processed email with label.
   Columns:

• label: Int type, 1 for spam and 0 for ham
• origin: String type, original pre-processed email

2. email_text.csv: Processed(by me) email body with label.
   Columns:

• label: Int type, 1 for spam and 0 for ham
• text: String type, processed email body

How I process email (from email_origin to email_text):

Email Processing

More dataset for spam or ham classification:

Emails for spam or ham classification (Trec 2007)

Emails for spam or ham classification (Trec 2006))

Emails for spam or ham classification (Trec 2005)

Emails for spam or ham classification SpamAssassin

Source:
http://nlp.cs.aueb.gr/software_and_datasets/Enron-Spam/index.html