Why does version 8 sendmail panic my SunOS box?
Sendmail 8.7.y panics SunOS 4.1.3_U1 (at least for 1 <= y <= 3) and SunOS 4.1.3, and sendmail 8.6.x seems fine on both machines (at least for 9 <= x <= 12). The problem is that a kernel patch is missing, specifically 100584-08 (4.1.3), 102010-05 (4.1.3_U1), or 102517 (4.1.4). This should be available from your hardware vendor through your support contract or their online support facilities (including being available on the SunSolve CD).