Highly Available HP-UX Internet Services (May 2008)

SG_SENDMAIL_SENDONLY

Starts or stops the Sendmail server in a send-only

mode.

NOTE: The variables are prefixed with SG to indicate that these variables specific to

HP ServiceGuard.

For a sample startup script, see “HP ServiceGuard Startup/Stop Script for Sendmail”

(page 23).

Integrating HP ServiceGuard with Sendmail

Consider the following before setting up Sendmail in an HP ServiceGuard environment:

• Ensure that the latest version Sendmail (8.13.3), preferably at the same patch level,

is installed on all the nodes in the HP ServiceGuard cluster.

• Do not start the Sendmail daemons explicitly from the startup (rc) script. You

must start Sendmail from the HP ServiceGuard environment. Therefore, ensure

that the following entries exist in the /etc/rc.config.d/mailservs file:

export SENDMAIL_SERVER=0

export SENDMAIL_SERVER_NAME=

export SENDMAIL_RECVONLY=0

export SENDMAIL_SENDONLY=0

export SG_SENDMAIL_SERVER=1

export SG_SENDMAIL_RECVONLY=0

export SG_SENDMAIL_SENDONLY=0

NOTE: The HP ServiceGuard startup/stop script uses the variables prefixed by

SG_.

• Ensure that proper permissions and ownerships are retained in the files/directories

on the shared volume by creating appropriate permissions for the files/directories

on the shared volume (by comparing against the base files/directories, that is,

/etc/mail.PREV and /var/spool/mqueue.PREV).

Ensure that you set appropriate permissions to the parent directories, /etc and

/etc/mail, and they are not world writable. Otherwise, the Sendmail startup

script can fail with the following error message in the

/var/adm/syslog/mail.log file:

451 4.0.0 /etc/mail/sendmail.cf: line 740: fileclass: cannot open '/etc/mail/sendmail.cw':

World writable directory

• Ensure that the value of the DeadLetterDrop Sendmail configuration file option

is a file available in a shared volume, preferably the

/var/opt/sendmail/dead.letter file.

• Ensure that the value of the ControlSocketName Sendmail configuration file

option is a file available in a shared volume.

Follow this procedure to setup Sendmail in an HP ServiceGuard environment: