Exchange 2010 Receive Connectors

In our case, Hub Transport has some send connectors that route emails through Smart hosts and some connectors directly through DNS MX records.


Receive Connectors is a little bit a gray area to me.

we have one named Anonymous connector, I do not understand the meaning of:
Specify the FQDN this connector will provide to respond to HELO or EHLO.
Under Network Tab, I see:
Use these Local IP address to Receive mail:
10.10.40.10
Receive mail from servers that have these IP addresses :
10.10.x.x
10.10.x.x
…..

under Permissions group:
Anonymous users
Exchange user


And we have another connector, it has:
Under Authentication, it has only one checkbox ticked : Transport Layer Security (TLS)
under permissions group : only Anonymous users is selected


Any explanation about this configuration will be very helpful

Thanks

One connector that is named Anonymous Relay:
Under network Tab (Use these local IP addresses to receive mail) is pointing to HUB01server.
and (Receive Mails from remote servers that have these IP addresses ) points to multiple IP addresses….. this part is clear.
Under group permissions Anonymous users and exchange users are checked….Does that mean another Exchange server cannot relay even if it is IP address is listed under :Receive Mails from remote servers that have these IP addresses ????
under Authentication :nothing checked off there (nothing selected)

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our default Receive connector:

Under network Tab (Use these local IP addresses to receive mail) is pointing to HUB01server.
and (Receive Mails from remote servers that have these IP addresses ) points to 0.0.0.0 255.255.255.255 addresses….. this part is clear.

under Authentication , everything is checked except for: Enable Domain Security (Mutual Auth TLS) and Externally Secured (for example, with IPSec)
under Permission Groups:
Exchange users, Exchange servers,Legacy Exchange servers are checked.
=================

we have another connector called public Smtp.
Use these local IP addresses to receive mail is pointing to HUB01 server.
Receive mail from remote servers that have these IP addresses points to 0.0.0.0  255.255.255.255
Authentication  has only the  "The Transport Layer Security (TLS)" checked.
Permission Groups : just Anonymous is selected.

===================
as for the Client connector:
under Specify the FQDN this connector will provide in response to HELO or EHLO, there is the OWA adderss : Webmail.company.com

under Network tab:
use these local IP addresses to receive mail is pointing to HUB01 server
Receive mail from remote servers that have IP addresses, is pointing to a node,  I am not sure what s the role of this node.
under Authentication:
TLS is checked , but Mutual Auth TLS is not.
Basic authentication is checked as well as  Offer Basic authentication

Exchange server Authentication is not checked
Integrated Windows Authentication is checked
Externally Secured is not checked
============
These are the connectors we have….the area which not really clear is the area under authentication tab and Permission Groups tab… why some checkboxes are selected and some not and what 's the effect of their selection


Thanks

Thanks