Blocking spoofed address

Discuss your pilot or production implementation with other Zimbra admins or our engineers.
manuns
Posts: 1
Joined: Tue May 22, 2018 7:13 am

Blocking spoofed address

Postby manuns » Tue May 22, 2018 7:20 am

How can i block email that are coming from fake emailer like emkei.cz to my domain. By using emkei.cz we can send email from abc@example.com to def@example.com without any authentication and this seems risk in upcoming days can. How can I prevent this in zimbra 8.6 opensource edition ???


User avatar
stefaniu.criste
Posts: 38
Joined: Wed Feb 12, 2014 5:40 am
Location: Romania
ZCS/ZD Version: 8.8.8_GA_1728 20180614052922 201806
Contact:

Re: Blocking spoofed address

Postby stefaniu.criste » Tue May 22, 2018 10:01 am

Two quick ideas (you need however to find their outgoing IPs)

- you could block their sending IPs at the firewall level (rough and brute)
- you can set a local RBL and add their IPs, as well as other nasty spammers (harder to implement, but very elegant)
Stefaniu Criste - managing partner
Hangar Hosting - a safe place for your business
proudly delivering Zimbra services in Romania

Return to “Administrators”

Who is online

Users browsing this forum: No registered users and 21 guests