Gmail Proxy

Google locks an IP after just a handful of failed logins or unusual country hops, flashes “Suspicious sign-in prevented” notices, and throttles SMTP to ~100 messages per connection; datacentre ranges are outright blocked. GSocks rotates each request through genuine consumer or 4G/5G carrier addresses so warm-up tools, deliverability labs and research crawlers keep hundreds of Gmail sessions alive without triggering reCAPTCHA or temporary bans.

An enterprise pool blends millions of residential IPv4/IPv6 endpoints with sub-second rotation and sticky pins (15–30 min) that hold SIDS, HSID and SSID cookies during IMAP IDLE or long SMTP transactions. Concurrency governors shard traffic so each IP stays under Gmail’s safe envelope of roughly 20 IMAP commands / sec and 10 SMTP messages / sec.

• Mail ports open — 993 (IMAPS), 465/587 (SMTPS) plus 443 for OAuth token refresh via HTTPS.
• Dual-stack exits — IPv6 paths tap Google’s edge POPs for faster STARTTLS handshakes.
• Live success dashboards — publish CAPTCHA rate, temp-fail (421/450) and deferral metrics.

Session persistence pins an IP so OAuth refresh tokens, push channels and Gmail Watch notifications remain valid across reconnects. IMAP/SMTP parallelism fans out hundreds of connections while auto-rotating before any one IP exceeds throttling thresholds. reCAPTCHA defence injects solver tokens or switches to an unflagged IP when Google presents challenge pages, keeping headless auth flows uninterrupted.

Cold-email warm-up. Automation platforms send low-volume, high-reputation messages from multiple seed accounts to lift domain sender scores—proxies prevent address clustering. Inbox placement testing. Deliverability suites fetch messages from geographically distributed seed inboxes to gauge Primary vs Promotions tab ratios. Anti-spam research. Security teams stream phishing samples into sandboxes without exposing corporate IP blocks.

1. Carrier or residential pool ≥ 5 million IPs—dilutes fingerprint overlap and keeps CAPTCHA frequency below 1 %.
2. <120 ms median RTT on ports 993/587—critical for IMAP IDLE and real-time warm-up loops.
3. Sticky-session toggle—15-, 30- and 60-minute pins for OAuth token lifetimes.
4. Rotation API—REST endpoint to force IP swap on hard bounce, temp-fail or CAPTCHA detection.
5. Reputation scoring—vendor should quarantine IPs with high spam-trap hits or RBL listings.
6. Transparent compliance policy—clear stance on bulk-mail terms, CAN-SPAM and GDPR to protect pool integrity.

Need bullet-proof Gmail sessions and accurate deliverability data? Spin up GSocks’ Gmail proxy bundle, assign each mailbox a sticky carrier IP and watch your warm-up graphs climb—no reCAPTCHAs, no suspicious-login emails.