Safe Processes?

I'm seeing these entries when I view my process lists.
UID PID PPID C STIME TTY TIME CMD
root 2137 1 0 Nov01 ? 00:00:00 sendmail: accepting connections
root 12802 2137 0 10:57 ? 00:00:00 sendmail: lA2EvwqQ012802 [86.111
root 12804 2137 0 10:57 ? 00:00:00 sendmail: server [86.111.14.62]
root 12846 2137 0 10:58 ? 00:00:00 sendmail: server [86.111.14.62]

root 2144 1 0 Nov03 ? 00:00:00 sendmail: accepting connections
root 2454 2144 0 11:53 ? 00:00:00 sendmail: server [212.152.61.190
root 2925 2144 0 12:31 ? 00:00:00 sendmail: startup with AOrleans-

I'm wondering if these are attempts at maliciousness, or are these legit
connections being made to my server. Usually I only see the first entry
which was caused by me, after running for awhile more entries "like" the
ones shown appear and disappear.

TIA
Paul