set tellme mailto <email-addr> By email. (Secure nicks only.)
and also when to consider them delivered (see `help !untell'):
set tellme unreliable Tell you once, then forget.
- set tellme pester <interval> Remind until you say !delmsg
set tellme remind <every-interval> [<within-interval>]
Remind until you talk on channel within <within-interval>
of me having told you. (Default is remind 1h 30s.)
+ set tellme pester <interval> Remind until you say !delmsg
:delmsg
delmsg [<nick> ...]