New posts in rfc

Is quoted-printable enough to make a mail compliant with the line-length-restriction posed in RFC 2822?

Data URI scheme and Internet Explorer 9 Errors

internet-explorer protocols rfc data-url

Check public DNS health and RFC compliance

domain-name-system blacklist rfc

How to overcome root domain CNAME restrictions?

networking dns rfc cname

Does the presence of a Content-ID header in an email MIME mean that the attachment must be embedded?

RFC that requires DNS servers to respond to unknown domain requests

domain-name-system rfc protocol

Hotmail wants me to modify my SPF record

spf reverse-dns ptr-record email rfc

Where is the documentation that states TCP and UDP source port should be over 1024 and random?

What is the point of the zones.rfc1918 file for Bind9?

bind internal-dns rfc

Are one-letter host names valid?

domain-name-system hostname rfc

What is the behavior difference between return-path, reply-to and from?

email smtp email-client rfc email-bounces

What's the point of repeating an email address in "The Envelope" and the "The Header"?

email smtp rfc legacy protocol

Which ICMP types (v4/v6) should not be blocked?

iptables ipv6 internet ipv4 rfc

Are two periods allowed in the local-part of an email address?

RFC 1918 address on open internet?

Why is RFC 7505 (Null MX) necessary?

domain-name-system rfc

Why do HTTP servers forbid underscores in HTTP header names

apache http nginx rfc

Why is form enctype=multipart/form-data required when uploading a file?

html http file-upload specifications rfc

RegEx to parse or validate Base64 data

regex base64 standards-compliance rfc

Legitimate reasons SMTP “MAIL FROM:” will not match “From:” Header in DATA