shell:$ nslookup -timeout=2 -retry=1 'mail1.univ-saida.dz'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
mail1.univ-saida.dz	canonical name = mail.univ-saida.dz.
Name:	mail.univ-saida.dz
Address: 41.110.190.118