[CentOS] Force sendmail outbound routing for specific domain name

     Your problem sounds like it has nothing to do with sendmail, but with any
IP traffic.  Does the other company have a Web or FTP site at the same IP
address or with in the same class C?  If so, when email doesn't work, I bet
neither of these work either.  I've seen this happen before.  The ISP isn't
properly routing traffic between your two networks.  I'm not sure you if you
could put in a static route that would by pass your ISP's faulty routing
tables or not.  I'm betting probably not.

-- 

  Brent L. Bates (UNIX Sys. Admin.)
  M.S. 912				Phone:(757) 865-1400, x204
  NASA Langley Research Center	  	  FAX:(757) 865-8177
  Hampton, Virginia  23681-0001
  Email: B.L.BATES at larc.nasa.gov	http://www.vigyan.com/~blbates/