PayPal uses many country code TLDs (ccTLD):
See https://www.xolphin.com/sslcheck/paypal.de fo the full list

DKIM Verifier could show the PayPal favicon for them as well.

The main ones could be added:

paypal.at
paypal.be
paypal.ca
paypal.ch
paypal.cl
paypal.cn
paypal.co
paypal.co.id
paypal.co.il
paypal.co.in
paypal.co.kr
paypal.co.nz
paypal.co.th
paypal.co.uk
paypal.co.za
paypal.com.ar
paypal.com.au
paypal.com.br
paypal.com.hk
paypal.com.mx
paypal.com.my
paypal.com.pe
paypal.com.pt
paypal.com.sa
paypal.com.sg
paypal.com.tr
paypal.com.tw
paypal.com.ve
paypal.de
paypal.dk
paypal.es
paypal.eu
paypal.fi
paypal.fr
paypal.ie
paypal.in
paypal.it
paypal.jp
paypal.lu
paypal.nl
paypal.no
paypal.ph
paypal.pl
paypal.pt
paypal.ru
paypal.se
paypal.vn