Email Validation Information

Cleaning your email list is an important step to maintain strong deliverability, reduce spam complaints, and stay compliant with email marketing best practices. This guide will help you understand when to clean your list, how it works, and what you need to consider before and after the process. Internet Service Providers (ISPs), anti-spam networks, and corporate email filters set thresholds for acceptable levels of spam complaints, hard bounces, and unsubscribe requests. If your campaign exceeds these thresholds, it can damage your sender…

Role-based email addresses are typically assigned to a specific job function, team, or department rather than to a named individual. Examples include addresses like support@, admin@, or info@. These are often used by multiple recipients and are designed for handling shared responsibilities such as customer support, IT management, or general inquiries. While role-based emails have legitimate uses, they are not ideal for email marketing or bulk communication. Here's why: To protect platform-wide deliverability and help users stay POPIA-compliant: You can still add…

BulkMail’s email verification system assigns a result and code to each email address checked. These codes help you determine which emails are safe to send and which should be removed to protect your sending reputation, reduce bounce rates, and maintain POPIA compliance. These are malformed addresses that are not valid emails. Examples: user@@example.com, [email protected] DON’T SEND – These entries are not logically correct and will always fail delivery. A spam trap is an email address used by ISPs or anti-spam services to…

Blacklisting occurs when your sending IP address or domain is added to a public or private DNS-based block list (DNSBL) because it has been flagged for suspicious or non-compliant email activity. This can have a serious impact on your email deliverability, causing your campaigns to land in spam folders — or be blocked entirely. Blacklists are maintained by organisations that monitor email behaviour and report senders that appear to be spamming or violating anti-spam laws. There are dozens of blacklist operators, but…

A catch-all (or accept-all) email is a domain-level configuration where the mail server is set to accept all emails, regardless of whether the specific mailbox exists. This means that even if the email address is incorrect or misspelled, the domain's mail server still accepts the message — making it impossible to know in advance whether the address is truly valid. Let’s say your domain is mail.example.com and the following email addresses are set up: Now, if your domain is configured as catch-all,…

A high-performance, real-time email verification service that validates individual email addresses instantly. Perfect for signup forms, contact validation, and real-time email quality checking. GET https://api.bulkmailapp.co.za/single/?api=YOUR_API_KEY&[email protected] Enhanced Verification with Data Enrichment GET https://api.bulkmailapp.co.za/single/?api=YOUR_API_KEY&[email protected]&photo=true&append=true&gsuite=true Human-Readable HTML View GET https://api.bulkmailapp.co.za/single/?api=YOUR_API_KEY&[email protected]&format=html 📋 API Parameters Required Parameters Parameter Type Description api string Your API key (required for authentication) email string The email address to verify (must be valid email format) Optional Parameters Parameter Type Default Cost Description format string json Free Response format: json or html photo…

A spam trap is a type of email address designed to identify and block senders who use poor list management practices, such as buying or scraping email addresses, or sending without proper consent. These traps are maintained by Internet Service Providers (ISPs), anti-spam organisations, and blacklist operators to protect inboxes from unsolicited or harmful emails. Sending to a spam trap can: If an ISP like Hotmail or AOL owns the spam trap you hit, your domain could be permanently blocked from sending…