smtpfieldmanual.com

.com crawl

First seen 2026-04-26 · Last seen 2026-05-16 · ok HTTP/1.1 200 1016 ms crawled 2026-04-30

US · 185.199.111.153 · AS54113 Fastly, Inc.

Reputation 100/100

Classifying

HTML metadata

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.
Language: en
Generator: Gatsby 2.21.7
Canonical: https://smtpfieldmanual.com/

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.

Analytics

Registrar

MarkMonitor Inc.

Created

2019-09-18

Expires

2026-09-18 122 days left

Updated

2025-03-25

Name servers

R12

from 2026-03-02 to 2026-05-31

Expires in 12 days