hello, this is my version ALMALINUX:
[root@pepsi ~]# more /etc/redhat-release AlmaLinux release 9.5 (Teal Serval) [root@pepsi ~]#
from weeks back HOSTNAME ( Subdomain.Domain.Tld) resolve perfectly from any country.
email and MX also work fine,
however when we try connect FROM SAME SERVER: https://S.D.T/client.php the log into /var/log/emaillog say:
[root@pepsi ~]# cat /var/log/maillog
Jan 8 08:14:31 dns postfix/smtpd[18045]: warning: hostname S.D.T does not resolve to address IP
Jan 8 08:14:31 dns postfix/smtpd[18045]: connect from unknown[IP]
Jan 8 08:14:33 dns postfix/smtpd[18045]: warning: unknown[IP]: SASL PLAIN authentication failed: (reason unavailable), sasl_username=(unavailable)
Jan 8 08:14:33 dns postfix/smtpd[18045]: disconnect from unknown[IP] helo=1 ehlo=2 starttls=1 auth=0/1 noop=1 quit=1 commands=6/7
[root@pepsi ~]#and ever the response from POSTFIX is:
Error: authentication failed: (reason unavailable)
when I do PING from the same server to S.D.T response is:
64 bytes from S.D.T (::1): icmp_seq=6 ttl=64 time=0.066 ms
however if I do PING to Domain.Tld, the response is:
64 bytes from S.T.T (IP: icmp_seq=17 ttl=64 time=0.047 ms
please, how I can fix this postfix?
thanks!