B2B Outreach
Cold Email Marketing Infrastructure
Reach decision makers, land in the primary inbox, and scale outbound pipeline without risk of suspension.
The Secret to Successful Cold Outreach at Scale
Cold email outreach remains one of the highest ROI channels for B2B lead generation. However, major cloud providers like SendGrid and Mailgun will abruptly shut down your account at the first sign of cold outreach.
171mails provides dedicated cold outreach SMTP relays configured specifically for outbound B2B messaging. We pair you with dedicated sender pools, custom SPF/DKIM authentication, and real-time list hygiene so you can contact prospects safely.
Why Senders Choose 171mails for Cold Email:
- Outreach Platform Compatibility: Plug directly into tools like Instantly.io, Smartlead.ai, Lemlist, Woodpecker, or your internal CRM.
- Built-In Suppression Scrubbing: Protect your domains by stripping out trap addresses, honeypots, and known complainers.
- Custom Tracking Domains: Configure your own white-label CNAME tracking for 100% domain alignment and maximum deliverability.
- Warmup Guidance: Gradual pacing strategies designed to build trust with Gmail and Outlook spam algorithms.