RE: External mail client cannot connect to server
02-28-2021, 11:34 AM
(This post was last modified: 02-28-2021, 11:35 AM by iraqiboy90.)
An update for this thread:
Outlook for android forces the use of port 465 (SMTPS) and port 993 (IMAPS) for encryption and wont work with any other ports like, 25, 143, or 587. This isn't mentioned anywhere official and took a while to find this info.
If you try to manually force those three ports, It will simply deny the certificate or wont load the account at all.
You will need to setup SMTPS in the master.cf file if you havent done so and enable SMTPS and IMAPS ports with your firewall
Outlook for android forces the use of port 465 (SMTPS) and port 993 (IMAPS) for encryption and wont work with any other ports like, 25, 143, or 587. This isn't mentioned anywhere official and took a while to find this info.
If you try to manually force those three ports, It will simply deny the certificate or wont load the account at all.
You will need to setup SMTPS in the master.cf file if you havent done so and enable SMTPS and IMAPS ports with your firewall
Code:
smtps inet n - n - - smtpd
-o syslog_name=postfix/smtps
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject