My current mail setup turned out to be very prone to sysadm errors @
math.berkeley.edu (and, due to GB/day range traffic, this situation is
not easy to change).  So it looks like lengthy interruptions of
service at ilyaz.org are hard to avoid.

In case of interruption, the workaround is to use login name ilya at
the Berkeley host mentioned above.

My apologies,
Ilya