Sendmail can be configured to remap email domain (sender email) from one to another such as mapping from mail.com to mail2.com
File is: genericstable
Format is:
@mail.com %1@mail2.com
rebuilt it to the correct db format using this command:
makemap hash genericstable.db < genericstable
You need to add the following 2 lines to the sendmail.mc file:
add the domain to generics-domains, format is:
mail.com
change the sendmail.mc to sendmail.cf using this command:
m4 sendmail.mc > sendmail.cf
Then restart sendmail.
FEATURE(`genericstable')dnlGENERICS_DOMAIN_FILE(`/etc/mail/generics-domains')dnl add the domain to generics-domains, format is:
mail.com
change the sendmail.mc to sendmail.cf using this command:
m4 sendmail.mc > sendmail.cf
Then restart sendmail.
In solaris, use this:
svcadm disable sendmail
svcadm enable sendmail
In Linux, use this
/etc/init.d/sendmail restart
