HP-UX Mailing Services Administrator's Guide

Sendmail 8.13.3
New Features in Sendmail 8.13.3
Chapter 3112
• Any value in a sendmailMTAAliasValue attribute is added to the
result string regardless of the object class.
• The mail attribute is added to the result string if the LDAP record is
a member of the inetOrgPerson object class.
•The uniqueMember attribute is a recursive attribute, used only in
groupOfUniqueNames records, and must contain an LDAP DN
pointing to another LDAP record. The intention here is to return the
mail attribute from those DNs.
•The sendmailMTAAliasSearch attribute and sendmailMTAAliasURL
are used only if referenced in a sendmailMTAAliasObject. They are
both recursive, the first for a new LDAP search string and the latter
for an LDAP URL.
Support for the FallBackSmartHost Option
When Sendmail prepares to connect to a remote host for transfer of mail,
it first performs a series of checks to identify the remote host. Sendmail
looks up the MX records and calls the res_search() BIND library
routine to find all MX records for the host. If Sendmail does not find the
MX records, it tries to deliver the message to a single original host, which
is a central mail hub to which mail can be forwarded. If this fails,
Sendmail attempts to deliver to the host listed with the FallbackMXHost
option.
Following is the format of the FallbackMXHost option:
FallbackMXhost=fallbackhost
The FallbackMXhost option works only if Sendmail can look up the host
name of the recipient. If Sendmail does not find the host name, the
FallbackMXhost is not useful. In such situations, Sendmail uses the
FallBackSmartHost option.
The FallBackSmartHost option specifies the name of a mail exchange
(MX record) that Sendmail must use as a last resort when MX records
are not available to identify the remote host. This option is given an
artificially low priority so that Sendmail tries to connect to it only if all
other connection attempts for the remote host have failed.
Following is the format for the FallBackSmartHost option:
FallBackSmartHost=hostname