Traditionally, that was the email address for the NTP service at various organisations, in the same way that postmaster was for the mail service.
replyFor those who need more context of who the Time Lords are
replyThe Time Lords are a fictional ancient race of extraterrestrial people in the British science fiction television series Doctor Who. In-universe, they hail from the planet Gallifrey and are stated to have invented time travel technology.
For further context, Doctor Who is a member of the species.
replyI think if we're being pedantic, the character's name is "The Doctor". The TV show is named "Doctor Who" but the character doesn't call themself that and a name is what something is called.
reply[Edited to avoid assigning a gender to a character who has had different genders]