Mailing Lists issues at Plesk 12.0.18 -linux-postfix

[Law]

Hi Sir,

We having issues with mailing list created at plesk, we would like to disable the moderation of mailing list. By referring to the post https://kb.odin.com/en/5255 we unable to access the mailing list admin page.

When we send email to mailling list it was required approval from moderator;

Reason: Post by non-member to a members-only list

At your convenience, visit:

http://lists.mydomain.com/mailman/admindb/testing123

to approve or deny the request.

We unable to reach the page above, please advice!

Thank you!