Outreach rules by country

Where a list came from does not decide whether you may email the businesses on it; the country's marketing rules do. Each page below sums up what the regulator's own guidance says about emailing and calling businesses, and links the source. It is a pointer, not legal advice.

United KingdomPECR (Privacy and Electronic Communications Regulations) and UK GDPR
IrelandePrivacy Regulations (S.I. No. 336 of 2011), GDPR and the Data Protection Act 2018
United StatesCAN-SPAM Act and the FTC Telemarketing Sales Rule (TSR)
CanadaCanada's Anti-Spam Legislation (CASL) and the National Do Not Call List (DNCL) Rules
AustraliaSpam Act 2003, Spam Regulations and the Do Not Call Register rules
New ZealandUnsolicited Electronic Messages Act 2007
GermanyUWG § 7 (Act against Unfair Competition)
NetherlandsTelecommunicatiewet article 11.7 (Telecommunications Act) and Civil Code book 6 article 193c
FranceCode des postes et des communications électroniques (article L34-5), GDPR, and Consumer Code article L223-1 for phone
SingaporeSpam Control Act 2007 and the Do Not Call (DNC) Provisions of the Personal Data Protection Act (PDPA)
South AfricaProtection of Personal Information Act 4 of 2013 (POPIA), section 69