zimbra: prevent SSL expired error

to prevent error SSL expired in zimbra you have to create a certificate with a validation date far in the future. to do so, do the following:

1. log in your zimbra admin account
2. under Tools click Certificates
3. select your email domain then click Install Certificate

it's a simple step by step option selection from there. i use self-signed certificate. you can also generate csr or install an already signed certificate from a certificate authorizer.

now, how would you remember to do this before your SSL certificate expires?? :))
if you don't and it already expired, you can refer to this for the fix: http://linusramos.blogspot.com/2012/01/zimbra-error-when-ssl-expired.html