: Connects to the mail server to verify if the specific mailbox is active without sending a real message.

: Compressed files from unverified sources can be used to deliver malware or "stealers" that target your saved browser credentials.

: These tools are often utilized for harvesting emails or validating lists for unsolicited mass mailing, which can violate anti-spam laws.

: Flags domains that accept all mail and identifies addresses designed to catch spammers. Potential Risks