sendmail[25143]:SYSERR(root): savemail: cannot save rejected email anywhere

Incorrect entry in sendmail .forward file causes Savemail Panic

Symptoms
 Where syslog.conf contains the lines:

*.err;kern.debug;daemon.notice;mail.crit /var/adm/messages
mail.debug   ifdef(`LOGHOST', /var/log/syslog, @loghost)

 The following messages are appearing /var/adm/messages:

Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.alert] q8U0ONCL009518: Losing ./qfq8U0ONCL009518: savemail panic
Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.crit] q8U0ONCL009518: SYSERR(root): savemail: cannot save rejected email anywhere
 Also /var/log/syslog:

Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.info] q8U0ONCL009518: to=sp.unixadmin.some-ip.com, ctladdr=root (0/0), delay=00:23:40, mailer=local, pri=121866, dsn=5.1.1, stat=User unknown
Sep 29 20:48:03 solarishost030 last message repeated 1 time
Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.info] q8U0ONCL009518: q8U0SmP6025143: return to sender: User unknown
Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.info] q8U0SmP6025143: to=sp.unixadmin.some-ip.com, ctladdr=root (0/0), delay=00:00:00, mailer=local, pri=3536, dsn=5.1.1, stat=User unknown
Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.alert] q8U0ONCL009518: Losing ./qfq8U0ONCL009518: savemail panic
Sep 29 20:48:03 solarishost030 sendmail[25143]: [ID 801593 mail.crit] q8U0ONCL009518: SYSERR(root): savemail: cannot save rejected email anywhere

Changes
 A .forward file was created for the root user.

Cause
There was a typo in the .forward file for the root user.

Solution
1. Correct the entry in the file:

% cat /.forward
# sp.unixadmin.some-ip.com  #<== incorrect entry

sp.unixadmin@some-ip.com #<== entry had a "dot" and needed a "@" to create the proper "user@domain" entry sendmail requires
2. Check that the entry resolves using sendmail:

% /usr/lib/sendmail -bv root
sp.unixadmin@some-ip.com... deliverable: mailer relay, host smtp.global.some-ip.com, user sp.unixadmin@some-ip.com
3. Run the "newaliases" command to update the alias.db:

% newaliases

/etc/mail/aliases: 15 aliases, longest 53 bytes, 264 bytes total