Category & trade
Primary
Tree path
Technology & Computing › Computing › Internet › Email
Group (tier-1)
Tech stack
AI readiness
AI-Readiness score
30 / 100 · partial · see similar
AI training policy
allowed
AI-bot protection
AI files
llms.txt ai.txt humans.txt robots.txt
Compliance (GEO / GDPR)
TLD
Overview
Title
SMTP Error Codes in the Wild | SMTP Field Manual
Description
A collection of raw SMTP error responses from major email service providers and spam filters.
Final URL
Language
en (html)
Scanned at
2026-07-12 18:40:48
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