Frequently Asked Questions
Get answers about ProjetoMX.
Is ProjetoMX free?
Yes! All diagnostic tools are 100% free. The site is supported by Google AdSense ads.
Do I need to create an account?
No. All tools are available without registration or login.
Are query results stored?
No. Queries are processed in real time and discarded immediately. We do not store domains, IPs, or search data.
How does the MX Lookup tool work?
The tool queries the domain's authoritative DNS servers for MX records, which indicate which servers receive email for that domain.
What is a blacklist check?
It checks if an IP or domain is listed on known spam databases (RBL/DNSBL). If listed, email delivery may be affected.
Why do I see ads on the site?
Google AdSense ads keep the site free. They do not interfere with tool functionality or results.
How can I contact you?
Send an email to contato@buildcalctools.online. We respond within 48 business hours.
Does the site comply with LGPD?
Yes. We have implemented a cookie consent banner, a transparent privacy policy, and we respect all your rights under the Brazilian General Data Protection Law.
Can I use the tools for automated monitoring?
The tools are designed for manual queries. For continuous monitoring, we recommend dedicated monitoring solutions.
What is the difference between SPF, DKIM, and DMARC?
SPF defines who can send email for your domain. DKIM adds a digital signature to emails. DMARC tells receivers what to do if SPF or DKIM fails. Together, they form the foundation of email authentication.