You should never use a purchased email audience in Mailcamp. Purchased, rented, scraped, or borrowed lists are not permission-based, and they can quickly damage your sender reputation, domain reputation, and campaign performance.
Mailcamp is built for sending to people who gave you permission to contact them. If the people on a list do not know you or did not ask to receive your emails, do not import or send to that list.
No real consent: people on purchased lists did not directly ask to receive your emails.
Low engagement: recipients are unlikely to open, click, reply, or trust your message.
High spam complaints: people who do not recognize you are more likely to mark your email as spam.
High bounce rates: purchased lists often contain old, invalid, inactive, or fake addresses.
Reputation damage: mailbox providers can use bounces and complaints to filter future campaigns to spam or reject them.
Your campaigns may show high bounce, unsubscribe, or complaint rates.
Contacts may be marked as bounced, blacklisted, unsubscribed, or suppressed.
Your account may be restricted if bounce or complaint rates become unsafe.
Your verified sending domain can lose trust with mailbox providers.
Future campaigns to legitimate subscribers may perform worse because of reputation damage.
Purchased email lists.
Rented or borrowed audiences.
Scraped emails from websites, directories, social media, or public databases.
Old lists where you cannot prove how people opted in.
Partner or event lists where people did not explicitly agree to receive emails from your brand.
Generic role addresses unless the owner clearly opted in, such as info@, sales@, or support@ addresses.
People who subscribed through your Mailcamp form or website signup form.
Customers, members, or users who agreed to receive marketing or product updates from you.
Event attendees who clearly opted in to receive emails from your brand.
Contacts collected with clear permission, a known source, and a relevant expectation of content.
Subscribers who can unsubscribe easily from every marketing email.
Confirm the source of every contact.
Remove unsubscribed, bounced, invalid, outdated, or risky addresses.
Import only contacts who gave permission to receive your emails.
Map fields correctly during the Mailcamp import process.
Use list verification when available to help identify invalid or risky emails before sending.
Consider using double opt-in if you want new subscribers to confirm their interest.
Add an embedded signup form to your website.
Use a popup form for relevant signup offers.
Invite existing customers to subscribe during checkout, onboarding, or account registration.
Create useful content that gives people a clear reason to subscribe.
Promote your signup form through owned channels, such as your website, blog, social profiles, or community.
Set expectations clearly so subscribers know what type of emails they will receive.
High bounce rate: stop sending to the list, remove invalid addresses, and review how the list was collected.
High spam complaints: pause broad campaigns and send only to contacts with clear consent and recent engagement.
Low opens and clicks: review list source, audience relevance, and whether subscribers expected your emails.
Many unsubscribes: check whether the audience actually opted in to your brand and content type.
Account or sending restrictions: clean your list, authenticate your sending domain, and rebuild with permission-based subscribers.