No. If you do not have your own domain name to use with us, you can use our domain name, zimbra.01.com, but only with our personal accounts.

With the identities feature in Zimbra, you can simply forward e-mail to your Zimbra account, and use whatever identity you have created to send "from". So for instance, if you have a mailbox called you@yourcompany.com, and you purchase a mailbox called you@zimbra.01.com from us, you can forward your mail from you@yourcompany.com to you@zimbra.01.com, and still be able to send e-mail from the Zimbra web interface from you@yourcompany.com.

However, if you have other people in your organization, you must share a domain name to take advantage of many of the collaborative features of Zimbra such as the global address list (GAL) and document sharing. In most cases, this requires you to switch your MX record for a domain to us, so that we're accepting all mail for that domain (there are exceptions, if you're using an up-to-date version of Postfix, the open-source email server software, or you've requested that we forward all mail received without a mailbox on the 01.com servers to another mail server, for example, your old server during migration).

So, what happens if you don't want to move your domain's MX record, and you still want to use Zimbra? You must either:

1. Purchase another domain to use for Zimbra (<$10/year at GoDaddy.com)
2. Use a host name, such as zimbra.yourcompany.com, for your Zimbra mailboxes at 01.com

There are some practical consequences to these decisions, and our recommended course of action, our best practices for groups of users under 50 are simply to move your MX record. Groups over 50 should read here.

If you choose to use a host name, such as zimbra.yourcompany.com, you may use identities to mask your "from" address so that it appears to be from company.com. It is assumed that your mail server for company.com would be forwarding e-mails to zimbra.yourcompany.com. Also note that using this option means that while recipients will effectively have the "zimbra." part of the zimbra.yourcompany.com addresses "masked", and just see the from addresses as company.com, without further customization your users will see their addresses as the full zimbra.yourcompany.com in the global address list (GAL). Additionally, when they send mail to their email address at yourcompany.com, it will go to your other (old) e-mail provider first, then be forwarded (back) to your mailboxes on the 01.com Zimbra server(s).