On 18-Aug-20 8:43, Caveman Al Toraboran wrote:
would i get blacklisted for simply not using spf/dkim/etc? even if no other user is using the mail service other than me and i'm not mass mailing?
Well, hear my story: I too was running simple mail-server. Just a few users I trust, no public relaying, so what could possibly go wrong? As it turned out later: everything! For a few months all was running as expected, but then some time later all valid email sent by my mail-server was suddenly flagged as spam and rejected. It took me some time to investigate but finally I found my domain (not IP) was on Spamhaus' DBL (domain block list). How did it get there? It seems that someone has created faked spf-record for my domain (I was not using dnssec at that time) and somehow spread it out (maybe using dns cache-poisoning?) to many public dn-resolvers. With that spf-record he authorised many spam-sending hosts to send email with sender field pointing to my domain. And that was even bigger problem, because one can easily switch to different vps/IP if it gets blacklisted, but I did not want to abandon my domain. It took me quite long time to fix everything. So short answer is yes! Even if you are not mass-mailing, you can still get blacklisted, if you do not secure your IP, domain and mail-server properly... Jarry -- _______________________________________________________________ This mailbox accepts e-mails only from selected mailing-lists! Everything else is considered to be spam and therefore deleted.
