Why Are My OTPs Going to Spam? Fix Guide

OTPs landing in the spam / promotional folder is a frequent complaint that almost always traces to mis-categorised routing or device-side aggressive filtering.

Why OTPs Get Filtered

• Wrong sender-ID category (AD- prefix instead of TX-/JX-).
• Spam-triggering wording (“offer”, “deal”).
• Aggressive Indian Android skin (MIUI, OneUI) filters.
• Truecaller / Hiya marking the sender as commercial.

Wrong Sender ID Category

Most common fix. Verify your sender ID is registered under the transactional / service-implicit category, not promotional. See our sender-ID guide.

Spam-Triggering Wording

Avoid words like “offer”, “deal”, “limited” in OTP templates. Stick to functional language: “Your verification code is X. Valid 10 mins.”

Device-Side Filtering

• MIUI: Settings → Messages → Block list / Auto-categorise.
• OneUI: Smart organiser feature.
• Truecaller: spam-marking on unknown senders.

Fixes

• Use correct DLT category.
• Use a registered sender ID with brand abbreviation.
• Functional template wording only.
• For users reporting issue, instruct on whitelisting your sender ID.

FAQ

StartMessaging routes under correctly-categorised sender IDs by default — your OTPs land in the primary inbox.