First of all i need to say sorry for my bad english.
I am having a issue with devecot + Postfix
i install centos 7 with virtual min . i can easily access all my emails from roundcube. but when i try to connect it with outlook or thunderbird it gives me error saying
mail client says : Thunder bird is failed to find the setting of this account
Than i check my maillog errors are something like this
Feb 16 18:41:27 bluehorntech postfix/smtpd[29217]: connect from unknown[86.188.129.1]
Feb 16 18:41:27 bluehorntech postfix/smtpd[29217]: lost connection after CONNECT from unknown[86.188.129.1]
Feb 16 18:41:27 bluehorntech postfix/smtpd[29217]: disconnect from unknown[86.188.129.1]
i have check my main.cf all fine.
if i try to not to give mail.domainname just give what i find in resolver it give me auth error.
Can any one help me on this why its doing like that
If roundcube able to access dovecot without problem, maybe firewall issue. Please provide iptables-save result, and make sure dovecot listen to WAN interface.