But its still good to use "auth_advertise_hosts" to restrict which hosts that are permitted to authenticate in addition to this. Else you will get bots that hack the password and then spam with your server.
In auth_advertise_hosts, you can use CIDR notation (like 123.123.123.0/24) to allow large amounts of hosts in case of dynamic IP or mobile terminals. So authenticated SMTP should still be IP restricted since there is bots out there guessing passwords (and hitting the right passwords sometimes and gaining access) -----Ursprungligt meddelande----- Från: Odhiambo Washington via Exim-users <[email protected]> Skickat: den 21 april 2021 12:36 Till: Douba Samuel DIARRA <[email protected]> Kopia: [email protected] Ämne: Re: [exim] RELAY NOT PERMITED exim4 On Wed, Apr 21, 2021 at 1:24 PM Douba Samuel DIARRA via Exim-users < [email protected]> wrote: > Hello > I was using Exim 4, in office (differents sites) but I was using vsat > system for interconnecting sites. I put private adresses to configure > exim in differents sites. > Since I published my servers on internet, I have this kind of error > message and i cannot send mails. the message is : RELAY NOT PERMITED > > Need some advices please Instead of relying on IP addresses for relaying (as should be listed in relay_from_hosts) it is better to use ASMTP ad the condition for relaying. So just set up authenticated SMTP and let users enable the same on their MuA and you are good to go. -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254 7 3200 0004/+254 7 2274 3223 "Oh, the cruft.", grep ^[^#] :-) -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
smime.p7s
Description: S/MIME Cryptographic Signature
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