Low Engagement & High Complaints: Recipients haven't opted in to hear from you

[hrsibar4405]

Spam Traps: Purchased lists are frequently contaminated with "spam traps" – decoy email addresses used by Internet Service Providers (ISPs) to identify spammers. Hitting these immediately blacklists your sending domain, preventing your emails from ever reaching an inbox.
High Bounce Rates: Many addresses on bought lists are outdated, invalid, or defunct, leading to a high percentage of hard bounces (permanent delivery failures). High bounce rates signal poor sender reputation to ISPs.

They will ignore your emails, delete them, or worse, philippines email list mark them as spam. High spam complaint rates are a red flag for ISPs and will lead to your emails being filtered to spam folders.
Reputational Harm: Your ESP will likely suspend or terminate your account for violating their terms of service (most reputable ESPs strictly forbid purchased lists). Your brand will be associated with spam, eroding trust with both potential and existing customers.

Zero ROI: You'll spend money on the list itself, ESP fees for a large (but useless) list, and content creation, only to achieve virtually no opens, clicks, or conversions. It's a money pit.
The More Controlled Approach: Email List Rental
What it entails: In an email list rental scenario, you typically do not receive direct access to the email addresses. Instead, you pay a third-party list owner or broker to send your message to their pre-existing, consented audience. It's more akin to a sponsored placement or an advertisement within their established communication channel. The list owner controls the data and sends the email from their own sending domain.

The Potential "Pros" (with significant caveats):

Access to a New Audience: It can provide a pathway to reach a specific, potentially relevant demographic or industry audience that you might not otherwise access quickly.
Leveraging Existing Trust: You benefit from the existing relationship and trust the list owner has built with their subscribers.
Reduced Direct Deliverability Risk (for you): Since the list owner sends the email, their sender reputation is on the line. You're not directly importing unconsented contacts into your own system.
Potential for Compliance (if done correctly): If the list owner has genuinely obtained consent from their subscribers that specifically covers third-party promotions, then the send can be compliant with consent-based laws.