The blocked sender feature can also be used to block top level domains (TLDs) based on country codes. Here is a list of top level domains that are based on country codes that can be cut and pasted into blocked sender list using the "bulk add" button: details
.ac
.ad
.ae
.af
.ag
.ai
.al
.am
.ao
.aq
.ar
.as
.at
.au
.aw
.ax
.az
.ba
.bb
.bd
.be
.bf
.bg
.bh
.bi
.bj
.bm
.bn
.bo
.bq
.br
.bs
.bt
.bw
.by
.bz
.ca
.cc
.cd
.cf
.cg
.ch
.ci
.ck
.cl
.cm
.cn
.co
.cr
.cu
.cv
.cw
.cx
.cy
.cz
.de
.dj
.dk
.dm
.do
.dz
.ec
.ee
.eg
.eh
.er
.es
.et
.eu
.fi
.fj
.fk
.fm
.fo
.fr
.ga
.gd
.ge
.gf
.gg
.gh
.gi
.gl
.gm
.gn
.gp
.gq
.gr
.gs
.gt
.gu
.gw
.gy
.hk
.hm
.hn
.hr
.ht
.hu
.id
.ie
.il
.im
.in
.io
.iq
.ir
.is
.it
.je
.jm
.jo
.jp
.ke
.kg
.kh
.ki
.km
.kn
.kp
.kr
.kw
.ky
.kz
.la
.lb
.lc
.li
.lk
.lr
.ls
.lt
.lu
.lv
.ly
.ma
.mc
.md
.me
.mg
.mh
.mk
.ml
.mm
.mn
.mo
.mp
.mq
.mr
.ms
.mt
.mu
.mv
.mw
.mx
.my
.mz
.na
.nc
.ne
.nf
.ng
.ni
.nl
.no
.np
.nr
.nu
.nz
.om
.pa
.pe
.pf
.pg
.ph
.pk
.pl
.pm
.pn
.pr
.ps
.pt
.pw
.py
.qa
.re
.ro
.rs
.ru
.rw
.sa
.sb
.sc
.sd
.se
.sg
.sh
.si
.sk
.sl
.sm
.sn
.so
.sr
.ss
.st
.su
.sv
.sx
.sy
.sz
.tc
.td
.tf
.tg
.th
.tj
.tk
.tl
.tm
.tn
.to
.tr
.tt
.tv
.tw
.tz
.ua
.ug
.uk
.us
.uy
.uz
.va
.vc
.ve
.vg
.vi
.vn
.vu
.wf
.ws
.ye
.yt
.za
.zm
.zwBe sure to remove from the list any TLD that you wish to still receive emails from. The country each TLD belongs to is listed in a Country code top-level domain Wikipedia article.
Blocking a TLD will not specifically block emails from senders in that country (TLDs can be used by senders in any country). To block emails based on the country or region the sender is located in, use the Geographic filtering policies feature.