Vitaliy Makkoveev <mvs@openbsd.org> wrote:

> > On 4 Feb 2025, at 01:22, Theo de Raadt <deraadt@openbsd.org> wrote:
> > 
> > What is the point of this 'validation'?
> > 
> > If the environment variable is trash, the mail doesn't work.
> 
> To prevent silent e-mail loss. The "sendmail: command failed: 501
> 5.1.3 Recipient address syntax error" in the syslog looks not
> correlating with calendar(1) to me.
> 
> Anyway, my question is not requirement, right?

If a user, in trying to redirect output away from their tty, misconfigures
to create such a ridiculous failure, is there any requirement that they
receive a problem report?