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I have two zimbra mail servers, on server-1 I have one domain with accounts. I want to be allowed to send email from server2, on behalf of account@domain.com that I dont have on server2, but this domain *@domain.com I have on server1. For now I can send such email on behalf of user that I want, but I can receive only in spam folder. What record should I add and where, so this can be done without going to spam?

madial9663
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There are many reasons why email could end up in someone's spam folder. In your case, however, the first thing I would look into is correctly setting up the SPF records

From Wikipedia:

SPF allows the receiving mail server to check during mail delivery that a mail claiming to come from a specific domain is submitted by an IP address authorized by that domain's administrators.[3] The list of authorized sending hosts and IP addresses for a domain is published in the DNS records for that domain.

In other words, you will need to create a DNS record for your domain that explicitly authorizes server2 to send email on behalf of that domain. More information specifically for Zimbra can be found on the Zimbra Wiki

Jaap Joris Vens
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  • Thanks very much, this is answer of my question. After I "whitelisted" IP address in SPF on my domain name record, now emails not going to spam. – madial9663 Sep 08 '20 at 14:59