I have a problem, my zimbra can't receive emails from outside, even though the delivery status was sent without an error message, before it was normal.
I've browsed from my server it's safe until I create a new server still the same case.
I asked my internet service provider there is no blocked port, I asked the hosting provider and my domain has no port blocked,
is there a problem with my network?
what should i check first in my network?
Discuss your pilot or production implementation with other Zimbra admins or our engineers.
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