does your boss have a rationale for his doubts, or are they based upon a 'gut' feeling? usually doubts arise based upon shortcomings. what shortcoming does your boss see in qmail (note, small 'q' - it is not "Qmail").
OK. He wants to know if there is a tendency on the market for some other mailserver. He asks me what mailservers the biggest linux/Unix distributors are using on their products. For example, what's the mailserver shipped with RedHat, Solaris, Mandrake, Debian, etc? I really don't know. I believe all of them are shipped only with Sendmail, but I'm not sure on this actually.
Do you know that? Thank you very much, Bruno.