Top Deliverability’s Blog
WttW: Message not compliant with the RFCs
- May 30, 2022
- Posted by: Top Deliverability
- Category: Industry News Word to the Wise
Word to the Wise just posted a engaging blogpost:
Every once in a while we’ll see a rejection from Yahoo that says RFCs 554 5.0.0 Message not accepted due to failed RFC compliance. What does that mean and what can we do about it? It really does mean exactly what it says on the label: there’s something about the message that is not in compliance with any number of RFCs and are not going to accept the message in its current state. When trying to help a colleague diagnose the issue I came up with a list of things to check. Troubleshooting in the email Is there any high ASCII without quoted printable or Base64 encoding in the body or the headers?Is there a Date header? Is there any duplication in header fields?Is there a bare IP address in a link somewhere?Are the line lengths inside the message shorter than 998 characters?Are lines correctly terminated with CR/LF?Is the DKIM…
Read more from the original source: Message not compliant with the RFCs
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- Term: Request For Comments (RFC)
- Term: Header
- Term: IP Address
- Term: DomainKeys Identified Mail (DKIM)
- Term: Email Service Provider (ESP)
- Term: SpamAssassin
- Term: Simple Mail Transfer Protocol (SMTP)
- Term: Accelerated Mobile Pages (AMP)
- Term: Extended Simple Mail Transfer Protocol (ESMTP)
- Term: Domain Name System (DNS)
- Term: Deliverability