[CentOS] sendmail sending out on port 587

> The other common option is to use port 465 for smtp over ssl - which should be
> something you can activate by uncommenting lines in your sendmail.mc and most
> clients handle.  Or use an outside account like gmail or yahoo that does this.

Please do not promote port 465 when everything else other than Lookout 
or Lookout Express (RIP) can support 587 and STARTTLS