Log in to your zimbra admin panel to manage Auto reply, Email forwarder, Email alias and Failed login policy.

Create Auto reply

•  Login to your zimbra admin panel and click on Manage

•  Now choose the option Accounts and double click on the email id you want to create auto reply.

• Now choose the option Preferences and put a check on Send auto-reply message.
•  Now type your message on the away message box.
• Finally click on Save to save your changes.

Email Alias

• Now to create an email alias choose the option Aliases and click on Add.

• Now put the email user name and your domain name that is your full email id.

Email Forwarder

• To create email forwarder choose the option  Forwarding then put the email id in the User-specified forwarding addresses.
• Now click on Add to complete the email forwarder.
• Finally click on Save to save your changes.

Failed login policy

• Now put a preferred number of consecutive logins failed on Number of consecutive failed logins allowed field.
• Select the time you want to lockout the account.
• Finally click on Save to save your changes.