Modules

Newsletter → Configuration → Modules

Modules are parts of the plugin you can switch on. Leave out what you do not need — a module that is off hooks into nothing, creates nothing and collects nothing.

All modules sit side by side at the top. A green dot means: running. Clicking one opens its settings; at the very top it says Module activated: Yes / No.

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The eleven modules

Module	Package	What for
Sending log	both	Who received which newsletter
Spam protection	both	Fending off automated sign-ups, without a third-party service
Post notification	both	Turning a post into a newsletter
Placeholder rule	both	Placeholders whose value depends on a condition
Statistics	Pro	Opens and clicks
Bounce processing	Pro	Fetching undeliverable mail and matching it up
Subscriber fields	Pro	Custom fields in the subscription form
Attachments	Pro	Attaching files to a newsletter
Captcha	Pro	Google reCAPTCHA on the form
SOAP interface	Pro	Third-party systems, the classic way
REST interface	Pro	Third-party systems, over HTTP

In the free package the Pro modules are not included — not switched off but simply absent. They therefore do not appear in the list either.

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What we recommend

Module	Recommendation
Spam protection	Switch it on. An open subscription form will be found. The module needs no third-party service and stores no IP address
Sending log	Switch it on. Without it you cannot say later who received a newsletter — and that is exactly the question that comes up when there is doubt
Statistics	As needed, and with an eye on data protection: it measures the behaviour of individual recipients
Bounce processing	As soon as your list grows. Dead addresses cost deliverability
Captcha	Rather not — the spam protection does the same without Google
Everything else	If you need it

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What happens when switching on and off

Switching on creates what the module needs: its tables, its defaults, its menu item. That is always additive — existing data is not touched.

Switching off deletes nothing. The module simply stops hooking in: its menu item disappears, its hooks no longer run, its tables stay. Switch it on again later and everything is back.

What a switched-off module does to running newsletters

It is missing. And the plugin tells you — when you open a newsletter that has not been sent:

• Placeholders nobody resolves. A %uf_1% from the subscriber variables reaches the recipient's text exactly as it stands.
• Files belonging to a module that is not running. The attachments are still there but no longer reach any mail.

Both messages disappear by themselves once the module is running again.

Newsletters already sent are unaffected: their HTML is frozen, and what was in it stays in it.

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Your own modules

If you write a module of your own, put it under wp-content/uploads/wpng/user_mods/. A file of the same name there replaces the supplied module.

Two things such a module should do, or it will stand out elsewhere:

• Implement abonnent_delete() if it stores anything about the subscriber. Otherwise the record is left behind when the subscriber is deleted.
• Implement datenschutz_auskunft(). Otherwise the module appears under Newsletter → Configuration → Data collected among those that said nothing — and saying nothing is not the same as collecting nothing.
• Read input through wpng_eingabe_*() or apply wp_unslash() yourself. Values in $_REQUEST are slashed, as everywhere in WordPress; taking them unchecked stores a backslash in front of every apostrophe.