Reliable cold outreach starts with healthy sending channels. SkySenders provides native infrastructure management for both sender mailboxes (Email) and connected LinkedIn accounts, backed by automated warmup and dedicated residential proxies.
Connecting Sender Mailboxes
SkySenders supports all major email service providers (ESPs):
Google Workspace: Connect via native OAuth 2.0 with one click. Grants secure sending access without storing sensitive account passwords.
Microsoft 365 / Outlook: Connect via Microsoft OAuth 2.0. Ideal for enterprise sending with strong native inbox delivery to Outlook recipients.
Custom SMTP & IMAP: Connect private email servers, SkySenders.ai Private SMTP infrastructure, Zoho, Yahoo, or Amazon SES by providing Host, Port (587 or 465 for SMTP, 993 for IMAP), Username, and Password.
DNS Authentication Checklist
Before sending high-volume outreach, ensure your domain DNS records are properly authenticated:
SPF (Sender Policy Framework): Authorizes SkySenders servers to send on behalf of your domain (e.g.
v=spf1 include:_spf.google.com ~all).DKIM (DomainKeys Identified Mail): Cryptographically signs outgoing emails to prevent header tampering.
DMARC (Domain-based Message Authentication): Specifies policy enforcement (e.g.
v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]).Custom Tracking Domain (CTD): Replaces shared tracking links with your own branded subdomain (e.g.
Replaces shared tracking links with your own branded subdomain (e.g. cdn.yourdomain.com pointing to cdn.sys-gateway.com) for superior deliverability.) for superior deliverability.
Automated Mailbox Warmup
SkySenders operates a peer-to-peer warmup network connecting verified inboxes. Warmup simulates human conversations, gradually building domain reputation:
Starting Volume: Begins at 1–5 warmup emails per day.
Ramp-Up Increment: Gradually increases by 1–2 emails per day up to your configured maximum limit (default: 30 emails/day).
Reply Rate Target: Maintains natural engagement by generating AI-powered replies between 30% and 50% of sent warmup emails.
Automated Spam Rescue: If a warmup email lands in the recipient's spam folder, the network automatically rescues it, moves it to the Primary Inbox, and marks it as important—training ESP algorithms that your domain is trustworthy.
Warmup Health Score: Continuously tracks inbox placement rate (0–100%) so you know exactly when an inbox is ready for active campaigns.
Connecting LinkedIn Accounts with Dedicated Residential Proxies
To automate LinkedIn outreach safely, SkySenders implements robust safeguards:
Cloud Browser Isolation: All automation runs on secure cloud containers—never on your local machine.
Dedicated Residential Proxies: Every connected LinkedIn account is assigned a dedicated residential IP address matching your home country and city. LinkedIn never sees data center IPs or abrupt location jumps.
Strict Human Safety Limits: SkySenders enforces daily safety ceilings: 12 Connection Requests, 25 Direct Messages, 4 InMails, 50 Profile Views, and 50 Total Actions per day.
Automated Invitation Withdrawal: Automatically withdraws connection requests that remain pending after a set duration (e.g. 14–30 days) to keep your pending ratio healthy.