[smsm42]

You don't need a "model" for this - I remember a Coursera course on ML I did some years ago, and one of the exercises was email extraction. With some very basic algorithms, nothing more than a bunch of common python libraries and couple of days of work, it's possible to extract over 90% of emails with commonly used tricks. I'm not sure the remaining number is worth making more complicated models for it - the returns are quickly diminishing, and wasting time on spamming people who are clever enough to invent their own unique email hiding technique probably doesn't have a good ROI anyway.