Email verification is more than syntax checks. Operationally, you're confirming the sending domain is configured correctly, the IP isn't blacklisted, and the address is reachable — without burning your sender reputation.
Most deliverability incidents start with a silent change: DNS edit, IP rotation, vendor swap. Running this workflow on a schedule catches drift before bounces start.
Run through these steps in order. Each step links to the right diagnostic tool.
MX resolution, SPF / DKIM / DMARC alignment, sender IP reputation, blacklist status, and TLS on the receiving mail host. Anything that affects whether legitimate mail lands in the inbox.
Address validation checks if a mailbox accepts mail. Operational verification checks if your sending infrastructure is configured correctly and trusted by receivers.
Weekly at minimum, daily for revenue-critical mail streams. SPF drift and silent DNS changes are the usual culprits behind sudden deliverability drops.
Mailbox-level SMTP probes can. Infrastructure verification — DNS, SSL, blacklist — never touches recipient mailboxes and is safe at any cadence.
Monitor it continuously
Save this check, get alerts on changes, and track multiple domains in one dashboard.