Reply from OEIS goes to BULK folder - why?

[N. J. A. Sloane]

Zak said:
why not to right simply "OEIS" in reply address
not to take several lines in message list by
"On-Line Enc... Int... Seq..."?

Answer: the reason is to make  it less likely that 
the reply will be treated as spam.

If only uppercase letters appear then that is a signal 
that the message was sent by a program rather than by a human.

NJAS