craigslist has implemented 2-way email relay to help stop spam and scams.
When replying to a post you'll see an address like:
When answering an email you'll see an address like:
Use your email program as you normally would.
PLEASE NOTE: The “real name” field (e.g. Jane Doe) in your email program is passed through to the recipient. Any contact information in the body of your message will pass through unaltered.
Q: I would like to stop a particular user from contacting me.
A: Click the flagging link at the bottom of the message.
Q: I accidentally flagged a message, how can I undo it?
A: At this time it cannot be undone.
Q: Which flagging link should I use if there are a bunch of nested replies in the message?
A: Use the most recent link.
Q: Can I continue to communicate with respondents after my ad has been removed?
A: Yes, existing reply email communication threads can continue for up to 4 months.
Q: How did the poster find out my real name?
A: The “real name” field your email program provides is passed through to the recipient.
Q: Where can I get more help?