host command is used for dns lookup
To see MX records used by hostonnet.com, run
host -t mx hostonnet.com
Example
root@server20 [~]# host -t mx hostonnet.com hostonnet.com mail is handled by 5 alt2.aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx5.googlemail.com. hostonnet.com mail is handled by 100 us2.mx3.mailhostbox.com. hostonnet.com mail is handled by 5 alt1.aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx4.googlemail.com. hostonnet.com mail is handled by 100 us2.mx1.mailhostbox.com. hostonnet.com mail is handled by 1 aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx3.googlemail.com. hostonnet.com mail is handled by 10 aspmx2.googlemail.com. hostonnet.com mail is handled by 100 us2.mx2.mailhostbox.com. root@server20 [~]#
To see MX and A records, run
host hostonnet.com
Example
root@server20 [~]# host hostonnet.com hostonnet.com has address 119.81.4.114 hostonnet.com mail is handled by 5 alt2.aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx5.googlemail.com. hostonnet.com mail is handled by 100 us2.mx3.mailhostbox.com. hostonnet.com mail is handled by 5 alt1.aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx4.googlemail.com. hostonnet.com mail is handled by 100 us2.mx1.mailhostbox.com. hostonnet.com mail is handled by 1 aspmx.l.google.com. hostonnet.com mail is handled by 10 aspmx3.googlemail.com. hostonnet.com mail is handled by 10 aspmx2.googlemail.com. hostonnet.com mail is handled by 100 us2.mx2.mailhostbox.com. root@server20 [~]#
