Question 1

What is cold email?

Accepted Answer

Cold email is an unsolicited email sent to a prospect you have no prior relationship with, for a legitimate business purpose. It is different from spam because it targets specific people with a relevant offer and always includes a clear opt-out.

Question 2

How many cold emails per day is safe?

Accepted Answer

For a warmed-up inbox, most teams send 30 to 50 cold emails per mailbox per day. New inboxes should start much lower, around 10 to 20 per day, and ramp over two to four weeks. Spread sends across multiple inboxes to scale safely.

Question 3

What is the best subject line length?

Accepted Answer

Three to seven words performs best in B2B outbound. Short subject lines look personal on mobile and avoid triggering spam filters. Avoid all caps, excessive punctuation, and words like "free" or "guaranteed".

Question 4

Plain text or HTML for cold email?

Accepted Answer

Plain text wins in cold outbound. It looks like a normal email from a colleague, sidesteps most spam filters, and renders reliably everywhere. Save HTML for newsletters and transactional emails.

Question 5

What GDPR rules apply to cold email in Europe?

Accepted Answer

Under GDPR, B2B cold email to corporate addresses is generally allowed under legitimate interest, provided the email is relevant to the recipient's role, includes a clear opt-out, and your processing is documented. Consumer email requires explicit consent.

Email Outreach

Email outreach FAQ

Join 3,000+ sales teams booking more meetings

Email Outreach

Email outreach FAQ

01What is cold email?

02How many cold emails per day is safe?

03What is the best subject line length?

04Plain text or HTML for cold email?

05What GDPR rules apply to cold email in Europe?

Join 3,000+ sales teams booking more meetings