GDPR, KVKK and Email Verification: What Marketers Should Know

This article is general information, not legal advice. Ask a qualified adviser for your situation.

Email addresses are personal data

Under the GDPR and Turkey's KVKK (Law No. 6698), an address that identifies or can identify a person is personal data. Collecting, storing and checking it must follow data protection rules.

Where verification fits

• Purpose: checking an address that you already hold lawfully so that you do not send to dead mailboxes is a data-quality activity linked to the purpose you collected it for.
• Minimisation: verify only the addresses you need and delete files you no longer need.
• Accuracy: both laws expect personal data to be accurate and kept up to date, which verification supports.
• Security: use a provider with a clear privacy policy and secure transfer.

What verification does not do

It does not create consent. Consent or another valid legal basis for emailing the person still has to exist.

Good practice

1. Keep records of consent.
2. Honour unsubscribe and deletion requests.
3. Limit retention. Mailbite archives uploaded lists and result files 14 days after they are created.
4. Read the provider's privacy and data processing terms.

See Mailbite's privacy policy and GDPR page for how we handle files.

The lawful basis question

Under the GDPR you need a lawful basis to process an email address, and for marketing the usual ones are consent or, in some cases, legitimate interest. Which one applies depends on the country, the audience (consumer or business) and the relationship. Under Turkey's data protection law (KVKK, No. 6698) the rules on consent and notification apply, and commercial electronic messages are also governed by the e-commerce law, which requires prior approval and registration of approvals in the national message management system. Always confirm details for your case with a lawyer.

Where verification helps with compliance

• Accuracy: data protection law expects personal data to be accurate and up to date. Removing dead addresses supports that principle.
• Data minimisation: you hold fewer addresses that serve no purpose.
• Fewer errors in sending: typos otherwise send your message to a stranger.

Choosing a verification provider

You share addresses with the provider, so check these points:

• Where is the data processed, and is there a data processing agreement?
• How long are uploaded lists and results kept? Mailbite archives uploaded lists and result files 14 days after creation.
• Is the data used for anything other than the check?

Good habits

Keep a record of how and when each contact consented, honour deletion and unsubscribe requests quickly, and do not share lists with third parties without a clear basis. See the privacy policy for how Mailbite handles data.