SMTP_BLOCK keeps turning ON

Operating System & Version
CENTOS 7.9
cPanel & WHM Version
v98.0.8

acethedog

Registered
Oct 2, 2021
1
0
1
Philippines
cPanel Access Level
Root Administrator
I don't know what's triggering my SMTP_BLOCK but after a few hours of manually turning it OFF in ConfigServer Security & Firewall, Firewall Configuration, it turns ON automatically by itself.

How can I turn it off indefinitely?

I have PHP Page that uses PHPMailer to send email using smtp.office365.com, it only works when I turn off the SMTP_BLOCK.
 

quietFinn

Well-Known Member
Feb 4, 2006
1,394
181
193
Finland
cPanel Access Level
Root Administrator
I don't know what's triggering my SMTP_BLOCK but after a few hours of manually turning it OFF in ConfigServer Security & Firewall, Firewall Configuration, it turns ON automatically by itself.

How can I turn it off indefinitely?

I have PHP Page that uses PHPMailer to send email using smtp.office365.com, it only works when I turn off the SMTP_BLOCK.
I don't understand how CSF would change any settings by itself, but maybe you could leave it ON, and use SMTP_ALLOWUSER setting.