Suppression & Audience Rules
How TouchDrop prevents duplicate sends, enforces frequency limits, validates addresses, and saves you money on wasted postage.
Suppression reasons at a glance
Recently Mailed
The recipient was mailed within the suppression window (default 45 days).
Do Not Mail
The recipient has been manually flagged as suppressed, or has a suppression date set in the future.
Frequency Cap Exceeded
The recipient has already received the maximum 3 postcards within the rolling 90-day period.
Invalid Address
The recipient’s address could not be validated as a deliverable Australian postal address.
Global Suppression Window
The global suppression window prevents a recipient from receiving another postcard too soon after their last one.
Default: 45 days
After a recipient receives a postcard, they are automatically suppressed for 45 days. During this period, no other campaign will send them a card — even if they qualify for one.
- Each campaign can override the global default with its own suppression window.
- TouchDrop checks when the recipient last received a postcard to decide eligibility.
- By default, the suppression window is shared across all your campaigns.
- You can also set campaign-specific suppression if needed.
Setting a very short window
Reducing the suppression window below 30 days is not recommended. Recipients who receive mail too frequently are more likely to view it negatively.
Frequency Cap
Even with global suppression in place, a hard frequency cap provides an additional safety net to prevent over-mailing.
Maximum 3 postcards per recipient in 90 days
No single recipient can receive more than 3 postcards within any rolling 90-day period, regardless of how many campaigns they qualify for.
- TouchDrop tracks how many postcards each recipient has received over the past 90 days.
- When the cap is reached, the recipient is automatically skipped until they fall below 3 in the rolling window.
- This cap applies across all campaigns for the same brand.
- The frequency cap works independently of the suppression window — both checks must pass for a postcard to be sent.
Address Validation
TouchDrop only delivers to Australian postal addresses. Invalid or incomplete addresses are caught before a postcard is sent to print.
Australian addresses required
- Address validation checks for required fields: street, suburb, state, and postcode.
- Australian postcodes must be valid 4-digit codes.
- Recipients with no address on file are automatically suppressed.
- Invalid addresses are flagged at processing time, not at import — so you can fix them before the next campaign run.
Deduplication
TouchDrop uses multiple layers to ensure no recipient receives a duplicate postcard within the same campaign.
Automatic duplicate prevention
- Each recipient can only appear once per campaign — duplicates are automatically blocked.
- If a recipient appears multiple times in an audience list, only the first occurrence is processed.
- Deduplication happens per campaign — the same recipient can appear in different campaigns.
Manual Suppression
Sometimes you need to permanently or temporarily prevent specific recipients from receiving mail.
Permanent suppression
Set the recipient’s “is suppressed” flag to true. They will never receive mail until you manually remove the flag. Useful for customers who have opted out or complained.
Time-based suppression
Set a “suppressed until” date on the recipient. They will be skipped until that date passes, then automatically become eligible again.
How Suppression Saves Money
Every postcard costs money to print and mail. Suppression rules ensure you only spend on mail that is likely to drive results.
- Duplicate sends are blocked — you never pay twice to mail the same person in the same campaign.
- Recently mailed recipients are skipped — no wasted spend on customers who just received a card.
- Frequency caps prevent over-mailing — so you don’t burn through your budget on diminishing returns.
- Invalid addresses are caught early — no postage is wasted on undeliverable mail.
- Manual suppression lets you instantly exclude specific people without modifying audience lists.
The suppression pipeline
- Campaign triggers and gathers eligible recipients from your audience.
- Each recipient is checked against the global suppression window (default 45 days).
- Recipients passing suppression are checked against the frequency cap (max 3 in 90 days).
- Address validation confirms a deliverable Australian postal address.
- Deduplication ensures no duplicate postcards exist for this campaign.
- Only recipients who pass all checks are queued for printing and charged postage.