login on somebody else account port 110

[aberrio]

how can avoid that user on a different domain login to email account on diferente domain user web1_info belongs to domain xxxxx.com user web5_info belongs to domain yyyy.com use web1_info was able to connect like this ...telnet mail.yyyy.com 110
USER web1_info
PASS web1_info pw

best regards

Al

[edge]

Do not use the same password?

re-reading your message, I do not think that you can.
all domains on your server point to the same IP.
So telneting to domain xxxx, will be the same IP as telneting to domain yyyy.

Owner of domain xxxx can still telnet to yyyy, but he will need to use the username and password of domain xxxx to login.
Same for user yyyy. He can telnet to domain xxxx (or the IP of the server), but need to use his username and password to login.

[till]

On every mailserver, you are able to connect with all domain names that resolve to this server as the domain does not matter as long as the IP points to the same server.

By the way, it is the same for SSH, FTP, SMTP etc.

[aberrio]

edge, using the user name provided by isp you should not be able to login on somebody else mailserver user name are different pw may be the same but on the local ldap table should contaned user name/pw relation, if you telnet to mail.xxxx.com should be diferent than mail.yyy.com

[till]

edge, using the user name provided by isp you should not be able to login on somebody else mailserver user name are different pw may be the same but on the local ldap table should contaned user name/pw relation, if you telnet to mail.xxxx.com should be diferent than mail.yyy.com

Thats not correct as you dont login to a different mailserver. As long as both domains are hosted on the same server, you login to the same mailserver.