we have an email list with approx. 850k emails.
The adresses are more than 3 years old and we will check, before we are sending our our newsletter:
1. Email address syntax checking
QuickEmailVerification validates email address according to IETF standards, like RFC 6531, RFC 5321, RFC 1035, RFC 2822, RFC 5322 RFC 2821 and RFC 1123. QuickEmailVerification validation can support domain literals, quoted pairs, quoted strings, comments, internationalized domain names (IDN) and mailboxes.
2. Domain/MX records checking
QuickEmailVerification checks and validates DNS entries for every email address under the verification process. It flags the result appropriately when the domain is invalid or missing MX entries.
3. Role address detection
QuickEmailVerification detects the role-based addresses. Role addresses are not associated with a person instead they represent a group, department or role. There are some addresses associated with high bounce rates and spam complaints which we detect and flag in the result appropriately. Sending emails to such addresses can adversely affect the deliverability.
4. Disposable email address (DEA) detection
QuickEmailVerification detects temporary created email addresses. There are certain services which provides temporary email address known as Disposable Email Address. Our system detects and flags such emails appropriately.
5. Accept all email checking
QuickEmailVerification performs accept all testing for email addresses and detects and flags the domain which accepts any email (wildcard) on their domain.
6. Mailbox existence checking
QuickEmailVerification performs deep level SMTP verification on each email address. Each email address will be verified for mailbox existence without sending actual emails on that address.
Please tell us in your offer, how you will clean it. Thanks!