shankar-bavan

SPF record check

• Open the command line (Start > Run > cmd).
• Enter nslookup -type=txt followed by a space and a domain or hostname, for example, nslookup -type=txt google.com.
• If an SPF record exists, the result will be something like this: v=spf1 include:_spf.google.com ~all.
• If there are no results or no v=spf1, then there is a problem getting the record for the domain, or it doesn’t exist.

DKIM record check

creachadair

Google Chrome Encrypted Cookies

Google Chrome stores browser cookies in an SQLite database. The database has two tables, meta containing format and version metadata, and cookies with the contents of the cookies. The cookies table uses this schema:

-- To reproduce: sqlite path/to/Cookies .schema
CREATE TABLE cookies (
   creation_utc     INTEGER  NOT NULL,  -- microseconds since epoch
   host_key         TEXT     NOT NULL,  -- domain
   name             TEXT     NOT NULL,

basham

CSS units

Recommendations of unit types per media type:

Media	Recommended	Occasional use	Infrequent use	Not recommended
Screen	em, rem, %	px	ch, ex, vw, vh, vmin, vmax	cm, mm, in, pt, pc
Print	em, rem, %	cm, mm, in, pt, pc	ch, ex	px, vw, vh, vmin, vmax

Relative units

Relative units