SMTP Hacking Issue

robust

Member
Jun 16, 2020
41
0
6
Hi,
Our SMTP's are getting hacked on the servers which are connected with ESP.
Advise us about securing it.
Thank you
 

wasif

Administrator
Staff member
Apr 9, 2019
240
36
28
Make sure your pmta config isn't being exposed and open to public view as it leaks the smtp credentials. And you can always restrict the SMTP connections to single or multiple source IPs by adding the following tag

Code:
<source 10.0.0.0/8>
    always-allow-relaying yes
</source>

<source 0/0>
    always-allow-relaying no
</source>
Replace 10.0.0.0 with your IP and /8 with the subnet size