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Glossary

Plain-language meanings of the terms you will meet in PostaraMail.

Opt-in
A clear action by a person (ticking a box, saying yes, confirming by email) to agree to receive your emails.
Double opt-in
A second step: the person clicks a link in a confirmation email before they are subscribed.
Notice
A line such as "By registering you agree to receive emails". It tells people, but it is not a tick-box opt-in, so it is not enough in strict regions.
Not asked yet
People from your website who have not said yes to emails. They are listed, never emailed, and not counted in your plan.
Declined
People who said no. They are never emailed.
Controller / processor
You decide why and how your contacts' data is used (controller). PostaraMail handles it for you on your instructions (processor).
DPA
Data Processing Addendum: the contract that sets out how PostaraMail processes your contacts' data.
Bounce
An email that could not be delivered. Hard bounces are suppressed automatically.
Complaint
A recipient marked your email as spam. Complaints suppress that address, and three suspend sending.
Open rate / click rate
The share of recipients who opened your email, or clicked a link. Open rates are estimates.
Automation
A series of emails sent automatically, with delays, when someone joins or you add them.
Sender
The name and email address your emails come from. It should be on a domain you verified.
DNS
The address book of the internet for your domain. You add small entries (records) to it to prove the domain is yours.
DKIM
A digital signature record that proves an email really came from your domain.
SPF
A record that lists who may send email for your domain.
DMARC
A record that tells inboxes what to do with email that fails the checks. Gmail and Yahoo like to see it.

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