Extract all email addresses from your IMAP mailboxes (and fill your CRM tool)
Updated
Email WOrk GAtherer
Updated
MailHole runs a super simple SMTP server which catches any message sent to it, and manages them through a REST API and a web interface. Run mailhole, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail that's arrived so far.
Updated