Knowledge base
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Guides, setup instructions and answers for everything you do in Bulko.
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6 sections · 30 articlesAccount registration, setup, and the essential first steps.
5 articles Email CampaignsCampaign creation, delivery settings, launch, and follow-ups.
5 articles SMTP and AccountsSMTP connection, configuration, limits, and account management.
5 articles AI and AutomationAI content variation, spintax, reply classification, and automation.
5 articles Analytics and ReportsCampaign statistics, key metrics, and performance analysis.
5 articles Email SecurityAccount security, sender reputation, suppression, and safe sending.
5 articlesRecent articles
Popular questions
Quick answers to what people ask most before their first send.
Ask your own questionHow does warming up SMTP accounts affect deliverability?
Warming up means gradually increasing sending volume from a new SMTP account. Warmed-up accounts earn more trust from mail providers and are more likely to land in the inbox.
How many SMTP accounts do I need to start?
For small campaigns (up to 10,000 emails) 2–3 accounts are enough. For medium volumes (10K–50K) we recommend 5–7 accounts with rotation.
What is spintax and how does it help?
Spintax is markup with several variants of a phrase. Bulko randomly picks one for each email, so every message is unique and less likely to be filtered as spam.
How do I collect replies to my emails?
All replies to your campaigns are collected in the Replies section automatically. AI sorts them into interested, questions and rejections, so you only work with the ones that matter.
Does Bulko integrate with other services?
Yes: webhooks, a public REST API and SMTP relay for your own apps. See the Integrations page for the full list.