Free tools for email marketing
No signup, right in your browser. Check your domain and your contacts, improve your subject lines and your prompts, measure your campaigns — the same technical rigor we bring to the platform.
SPF, DKIM & DMARC checker
Check whether your domain has authentication properly configured. Live lookup from your browser.
Open toolSubject line analyzer
Paste your subject line and get a score with recommendations: length, risk words, emojis and personalization.
Open toolMetrics calculators
Calculate open rate, CTR, CTOR, bounce and unsubscribe rate with benchmark ranges for LATAM.
Open toolPrompt builder
Build the perfect instruction for AI-generated campaigns: guided structure, industry examples and a quality score.
Open toolDomain reputation
A broad diagnosis of your domain's public signals: SPF quality, DMARC strength, MX, BIMI and more, with a score.
Open toolEmail checker
Check an address before adding it: syntax, domain, MX, disposable addresses, role inboxes and typos.
Open toolThese tools are just the tip of the iceberg
Inside arrobaMail you get all of this built in, plus Amanda IA, automation and deliverability cared for by our own sending engine. Create your free account, no card required.
Free Plan · AI generations included · no credit card