Some customers may experience missing, delayed, or blocked emails related to pest control or weed management services.
This issue is not provider-specific. It can occur across major email platforms due to how automated content filtering works — especially when emails include industry-standard terminology related to treatment and application.
This article explains why emails are blocked due to content, the common red-flag words, and the recommended wording changes that help prevent this issue.
Common Red-Flag Words
The following terms are legitimate but may increase blocking risk when combined or repeated.
Pest Control–Related Terms
crack and crevice
crack & crevice application
injection
penetration
bait placement
chemical treatment
Weed & Lawn Care–Related Terms
weed control
herbicide
chemical application
spraying / sprayed
kill / killing
Context Amplifiers
application
treatment
control
chemical
repeated technical descriptions
Recommended Word Changes (Email & Customer PDFs)
Using neutral wording in emails and emailed PDFs significantly reduces blocking risk.
Pest Control
Original Term | Recommended Alternative |
Crack and crevice | Targeted structural areas |
Crack & crevice treatment | Precision interior treatment |
Crack & crevice application | Localized structural treatment |
Chemical treatment | Professional treatment service |
Bait placement | Targeted monitoring and control |
Weed Control
Original Term | Recommended Alternative |
Weed control | Vegetation management |
Herbicide application | Selective vegetation treatment |
Chemical weed treatment | Landscape treatment service |
Weed spraying | Targeted landscape treatment |
Kill weeds | Growth control service |
Change the wording (best immediate fix)
This is honestly the most reliable solution.
Instead of:
crack and crevice application
Use:
“void and gap treatment”
“harborage-area treatment”
“targeted surface treatment in confined areas”
“precision treatment in structural gaps”
“treatment in narrow structural spaces”
💡 Pro tip: even changing it once isn’t enough — remove it everywhere (subject, body, footer, attachments).
Instead of:
Weed control / herbicide application
Use:
Vegetation management service
Targeted vegetation treatment
Landscape treatment service
Growth control service
Selective plant management
These are widely used by large operators specifically to avoid spam filters.
Subject line examples (this matters a LOT)
❌ Bad:
Weed Control & Crack and Crevice Treatment Completed
✅ Good:
Property Treatment Completed
Scheduled Service Completed
Landscape & Interior Service Update
Then explain briefly and generically in the body.
Why Emails Are Blocked Due to Content
Modern email providers use automated filtering systems that scan:
Subject lines
Email body text
PDF attachments
Inline previews
These systems rely on machine learning and pattern recognition. They do not evaluate industry context or regulatory intent.
As a result, certain legitimate service-related terms may be incorrectly classified as unsafe or inappropriate — particularly in automated or bulk emails.
This behavior affects:
Gmail
Outlook / Microsoft 365
Yahoo Mail
Apple Mail (iCloud)
Corporate email security systems