Configuring external e-mail service

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Hello, I'm trying to configure external e-mail service (zoho.com) on my VestaCP server.

Cloudflare settings (not using proxy):

Code: Select all

ns1.domain.com -> vesta ip
ns2.domain.com -> vesta ip
web.domain.com -> vesta ip

@.domain.tld -> mx.zoho.com
@.domain.tld -> mx2.zoho.com
@.domain.tld -> mx3.zoho.com

Now, when I try to login with roundcube, this error appears:
Connection to IMAP server failed


Can someone guide me on what do I need to do next to have external e-mail configured?
Thanks!