1. Mandatory Email Authentication (Now Enforced)
Google and Yahoo require email authentication protocols to deliver messages to the inbox.
Ensure all three records are set:
SPF
āDKIM
āDMARC (required since February 2024 for bulk senders)
ā
Use tools like Google Admin Toolbox to verify setup.
2. Unsubscribe Links Are Now Mandatory
Bulk senders must include a one-click unsubscribe link. Non-compliance leads to deliverability penalties or outright blocks.
Best Practice:
Add a clear and visible āUnsubscribeā or āOpt-outā link in all emails.
āAvoid deceptive language like āUpdate preferencesā or hiding the link in footers.
3. Manage Sending Volume Carefully
Over-sending is one of the fastest ways to burn a domain.
Recommended Limits:
30ā50 cold emails per inbox/day (depending on warm-up status).
āUse inbox rotation to send at scale across multiple domains.
ā
4. Avoid Overuse of Tracking Tools
Excessive use of open and click tracking can trigger spam filters, especially if both are used simultaneously or embedded in bulk.
Tips:
Use only one tracker (open or click or avoid using Open tracking at all).
āAvoid link shorteners like Bit.ly.
āPlain-text emails = better trust + fewer tracking red flags.