Guides to sending email from your own accounts
How to set up X Mailer, which mail port to use, and how a proxy fits in.
How to set up and test a SOCKS5 proxy
Set up a SOCKS5 proxy step by step. What each part of the endpoint means, how to sign in, and how to test the address, location and ports before you rely on it.
Residential proxies by country: choosing a location
How country and region targeting works on a residential proxy, which location to choose for your accounts, and how to check where your connection really appears.
Where do residential proxy IPs come from?
Residential proxy IPs are real home connections. How networks get them, what consent-based sourcing looks like, and the questions that expose a badly sourced pool.
Clean proxy IPs: how to check an address's reputation
What makes a proxy IP clean, how shared addresses pick up a bad reputation, and how to check any proxy address against public blocklists in minutes.
Unrestricted proxy: what "all ports open" means
What an unrestricted proxy is, which ports most proxy networks close and why, and how to test any proxy's ports yourself before you rely on it.
What is an SMTP proxy? Why port 587 gets blocked
An SMTP proxy carries your mail connection through another internet address. How it works, how it differs from SOCKS5 and a relay, and why port 587 is blocked.
Residential vs datacenter proxies for email
Residential or datacenter proxy for email? What each kind is, why the mail ports matter more than the kind, and what else to compare before you buy.
Rotating proxies for email: sticky or per-send?
Sticky or per-request? How a rotating proxy for email changes your address, which mode suits your sending, and how it fits with account rotation.
SMTP rotation: share a campaign across accounts
SMTP rotation sends one campaign through several email accounts in turn. Why it helps, which X Mailer settings matter, and how it differs from IP rotation.
Port 587 blocked? How to test it and what to do
Port 587 not working? What a timeout, a refused connection and a sign-in error each mean, how to test the port on Windows, and the fixes to try in order.
Port 587 vs 465 vs 25: which SMTP port to use
SMTP ports 587, 465 and 25 do different jobs. Which one your mail app should use, how to check that port 587 is open, and what changes behind a proxy.
What is X Mailer, and who is it for?
X Mailer is a Windows app that sends your email campaigns through the accounts you already own. Who it is for, how a send works, and where the proxy fits.