Campaign forwarding #376
Description
Implement a full “Forward to a Friend” feature for phpList 4, similar to the forwarding functionality available in phpList 3. The goal is to allow subscribers to forward a campaign to another email address through a controlled phpList UI, ensuring proper tracking, deliverability, and statistics.
Objectives
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Provide a forwarding link inside campaigns (e.g., [[forward_url]] placeholder).
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Display a forwarding form where the subscriber can enter one or more recipient email addresses.
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Send a clean, tracked copy of the campaign to the forwarded recipient(s).
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Maintain accurate deliverability by having phpList send the forwarded email directly (not relying on the user’s email client).
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Add per-campaign forward counters (e.g., forwards, forwards_html, etc.) similar to phpList 3’s metric.
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Include forwarding events in campaign statistics and reports.