SMTP error: "Failure when receiving data from the peer​"-How to change to AUTH LOGIN?

[matib55]

Hello,
I'm using Zabbix ver.6.0.12 on CentOS 8.
When i tried to test e-mail notification i get error "Failure when receiving data from the peer". From Zabbix logs i find that Zabbix try to use AUTH GSSAPI not AUTH LOGIN. I test my connection using openssl and i know the connection to SMTP server and sending message works fine, but only with AUTH LOGIN.
I check curl version, it is ver.7.61.1, so it is probably ok, comparing to documentation.
I try to find a file/script to change this option but i can't find it on Centos. Anyone can help ? What is location of file that i can modify ?


Topics below are related to my problem, but i can't find solution:
https://support.zabbix.com/browse/ZBX-18532 - there is fragment of the file, but i can't find exactly location of file, even though it is described. I think in ver.6 it is located elsewhere.
https://www.zabbix.com/forum/zabbix-...tication-issue

[rnadal]

Hello,

I have the same problem . I'm asking someone for help. I spent two days looking for a solution and didn't find anything useful.

[matib55]

I haven't find solution yet. Honestly, I'm giving myself some time to clear head and then I will try find solution for this again.
If anyone knows, where can i find all scripts and file to edit like i said before I would be very grateful.