Incoming email settings link not appearing

Incoming e-mail is a feature which allows users to e-mail an address and have the content of that e-mail appear in a document library, discussion board, or any other list supported under SharePoint.

While enabling the incoming email settings in our MOSS farm, we came across a strange problem. We installed SMTP on one of the servers in the farm. The email domain that we used was dzeee.net (e.g. doclib@dzeee.net). After installing SMTP, we confirmed that every thing was proper.

Open IIS
Check if Default SMTP Virtual Server is installed.
If installed, right click and select Properties.
Click Delivery tab and click Advanced.
Check if the Fully-qualified domain name is set to .subdomain.dzeee.net
Check whether the drop folder is present at C:\Inetpub\mailroot
Check the dzeee.net folder is present at C:\Inetpub\mailroot\Mailbox

Enabled incoming email from Central Admin.

Open Central Admin.
Click Operations --> Incoming Email Settings
Check if the following details are set:
Enable Incoming Email -
 Enable sites on this server to receive e-mail? Yes
 Settings mode: Automatic
Directory Management Service -
 Use the SharePoint Directory Management Service to create distribution groups and contacts? No
Incoming E-Mail Server Display Address -
 E-mail server display address: mylist@dzeee.net
Safe E-Mail Servers -
 Accept mail from these safe e-mail servers: ip addresses of the mail servers

Open a site.
Click View All Site Content and Open a document library
Click Document Library Settings

We do not find the Incoming email settings in the Communications section.

SOLUTION

To resolve this we opened the Virtual SMTP server in the IIS and figured out the the domain that was created was a local domain. We needed to create an alias domain with the same name (dzeee.net) so that the SMTP could get all the mails from our global smtp servers.

Once this alias was defined, we were able to see the Incoming email link in the Document Library settings.