This dataset contains emails for spam or ham classification. It's from "2005 TREC Public Spam Corpus". There are three files:

1. email_origin.csv: Original raw email with label.
   Columns:

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

2. email_text.csv: Processed email body with label.
   Columns:

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

3. trec05p-1.tgz: Origin compressed file downloaded from source.

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 (Enron 2006)

Emails for spam or ham classification SpamAssassin

Source:
https://plg.uwaterloo.ca/~gvcormac/treccorpus/about.html