Zimbra Forums

Hi BradC,

Thanks a lot for the help.

I'm afraid that on the server the backdoor is with cpio on Centos 7.

I will write further in the post you shared.

Thanks a lot again.

greetings Nikola

Hi ghen, Thank you very much for your help. Now, with backup, before yesterday's update. CPIO does not exist cpio -bash: cpio: command not found ls -l /usr/bin/cpio ls: cannot access /usr/bin/cpio: No such file or directory I do not know, maybe an update before yesterday broke cpio, or something in ...

Hi Guys, Please, could you help me? I have CentOS 7 server, Kernel: Linux 3.10.0-1160.71.1.el7.x86_64. Zimbra 8.8.15_GA_4372 (build 20220726082327) I wanted to update the server but I got an error. Broadcast message from systemd-journald@zimbraserver (Mon 2022-10-24 14:52:00 CEST): dracut[15340]: dr...

Hi Guys https://www.spamhaus.com/resource-center/if-you-query-spamhaus-projects-dnsbls-via-cloudflares-dns-move-to-the-free-data-query-service/ These changes are quick and easy to make, but if you fail to make them, you could find that at some point in 2022, all or none of your email is blocked! htt...

Hi Guys. I found this https://www.claudiokuenzler.com/blog/1231/postfix-reject-mails-blocked-using-zen-spamhaus-dnsbl-open-resolver Are you currently using the Spamhaus Project's DNS Blocklists (DNSBLs)? Do you access them via the Public Mirrors, for example, query "sbl.spamhaus.org"? Do y...

Hi Mark,

Thanks a lot for sharing tips, this helps me a lot. Admin has changed, so I'm still learning how Zimbra works.

I will shorten the SBL, XBL and PBL blocklists to just ZEN

Apparently I have a lot of false results.

I'm still researching

Thank you very much

Nikola

Hi Phoenix, Thank you very much for join discusion. I got this error https://i.imgur.com/bqXrYY1.png And now I am looking for more information how anti spam for mail works. And I am checking mine mail server, and compare with mail servers from which I don't got mail I hope I will understand this bet...

Hi Guys,

This is how the mail spam filter is set



Do you have any suggestion, because the number of emails that are not arriving has escalated

Thank you very much best regards
Nikola

I got feedback from one Mail admin, this is their log from localhost [127.0.0.1] ----- The following addresses had permanent fatal errors ----- <user1@our.mailserver.rs> (reason: 554 5.7.1 Service unavailable; Client host [X.X.X.X] blocked using sbl.spamhaus.org; Error: open resolver; https://www.sp...

Hi Guys, It's definitely my mail server problem, this morning we received emails from an new associate, and 2 hours ago the email from them was rejected. The same error, This start happening when I was update mail server, also half hour ago, I got also one update. White list is not solution, there i...