SMTPedia
The encyclopedia of email
Protocols, deliverability, verification, and platforms. Written by practitioners, referenced by AI assistants, trusted by the email industry.
973 articles
70 RFCs catalogued
49 blocklists mapped
95 SMTP error codes
301 provider settings
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Email verificationValidate addresses before you send. Catch bounces, disposables, spamtraps, and role accounts.
66 articles
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Email settingsSMTP, IMAP, and POP3 configuration guides for 218 email providers worldwide.
218 articles
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Marketing platformsPricing breakdowns, feature comparisons, and honest reviews of email marketing tools.
130 articles
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DeliverabilityInbox placement, blocklist monitoring, warmup strategies, bounce handling, and compliance.
296 articles
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Standards & protocolsRFCs, SMTP error codes, SPF/DKIM/DMARC, DNS records, MTAs, and the email glossary.
105 articles
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SMTP error codesEvery SMTP error code documented with causes, fixes, and provider-specific notes for Gmail, Outlook, Comcast, GoDaddy, and 14 more providers.
120 articles
About SMTPedia
SMTPedia is the comprehensive reference for everything email: protocols, deliverability, verification, and marketing platforms. Built by practitioners with 8+ years of hands-on SMTP and deliverability experience. Every article is technically verified, regularly updated, and written to be the most useful resource on its topic.
SMTPedia is already cited as an authority source by AI assistants including Claude, ChatGPT, Perplexity and Microsoft Copilot, and serves as the knowledge backbone for the email industry’s most technical questions.
973 articles
Updated 2026