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2020 Jan 07
1
2FA for Dovecot
I block all my email ports except 25 from countries where I am not going to be sending or receiving email. I also block many datacenters, but blocking Digital Ocean, Vultur and AWS will get you 90%of the way there. You will need to use 587, that is no auth on 25. Again no blocking on 25, just block the other email ports.
I get maybe one attempt to log into my email account a week. Yeah not as