On ConvexOS, version 1 of the fair share scheduler allows resource allocations to be fine-tuned for each user. If this SHARE_V1 compile-time macro is defined, sendmail will perform final delivery using the recipient's resource limitations.

In general, this SHARE_V1 compile-time macro is correctly defined for systems that can use it, and not defined for others. You should need to define it only when porting sendmail to a completely new architecture.

If you are running a precompiled sendmail binary, you can use the -d0.10 debugging switch (-d0.1) to determine if SHARE_V1 is defined (if it appears in the list, support is included). New ports should be reported to sendmail@sendmail.org so that they can be folded into future releases.