Thank you till for your precious help and advices!:) Really appreciated! I will try to implement some blacklisting and spf verification! Best,...
Hm... ok, I see what you are saying! Like saying that when a johndoe@gmail dot com uses gmail's smtp to mail me, then this smtp doesn't have to...
Hi Till, thank you for the reply. No my server is not an open relay, but anyone without authentication can use it to spam adresses hosted in the...
Hello dears, I followed this guide https://www.howtoforge.com/perfect-server-ubuntu-12.04-lts-apache2-bind-dovecot-ispconfig-3 to install my...
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