Zendesk Sender Authentication: Test SPF and DKIM Now
Zendesk now defaults eligible accounts to its Minimal sender authentication profile. Test every sending domain before a failed SPF and DKIM combination sends a business-critical email to Suspended tickets.
Secure SMTP Relay Checklist: Test Authorization and TLS
Approve a secure SMTP relay with repeatable tests for identity, sender and recipient scope, TLS, rejection behavior, and audit evidence.
SMTP Relay vs SMTP Server: What You Actually Choose
SMTP relay vs SMTP server is really a choice between running the mail transfer layer yourself and delegating it to a managed provider.
Office 365 SMTP Relay: Choose the Right Sending Method
Choose the right Office 365 SMTP relay method by recipient scope, authentication, mailbox licensing, and the evidence your team can retain.
Google SMTP Relay: How to Set It Up and When Not To
Set up Google SMTP relay for controlled systems by narrowing sender scope, restricting public IPs, and requiring TLS. It is a poor fit for cold outbound.
What Is an SMTP Relay? The Handoff Between Mail Servers
An SMTP relay accepts email, routes it to the next server, and reports failure when delivery cannot continue. Acceptance does not prove inbox placement.
MX Record Lookup: Which System Will Filter Your Message
An MX lookup names the mailbox provider that decides where your message lands. It tells you nothing about whether the address exists, and confusing the two costs domains.
ARC Email Authentication Is Not Yours to Publish
ARC is implemented by the servers that forward your mail, not by the domain that sends it. Knowing that changes what you do when forwarded messages fail DMARC.
BIMI: What the Logo in the Inbox Actually Requires
BIMI puts your logo beside your name in supporting inboxes, but only after DMARC enforcement on the organizational domain and its subdomains. For cold outbound domains it earns nothing.
Ready to build outbound that compounds?
We'll build the entire system for your business, and the infrastructure it runs on stays yours.
Book Your Free Discovery Call →