Is Email Warm-up Necessary for New Mailboxes?
Last updated May 10, 2025
Absolutely. All new mailboxes (Google, Microsoft, SMTP), even on aged domains, shouldbe warmed up for at least 14 days (20-30 recommended) before starting cold outreach. This builds essential sender reputation. Do not send cold campaigns during this initial warm-up phase without understanding the risk to your new inboxes.
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