: Sending to people who haven't opted in leads to high spam complaint rates. Internet Service Providers (ISPs) and Email Service Providers (ESPs) like ClickDimensions may blocklist your domain or permanently ban your account.
: Recipients often find unsolicited emails annoying, which can tarnish your brand's reputation before you even build a relationship. If You Still Decide to Buy (B2B Context) buy customer email list
While discouraged for general B2C marketing, some B2B companies use reputable databases for highly targeted cold outreach. If you proceed, follow these best practices: : Sending to people who haven't opted in