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are stored on servers located in Switzerland, under Swiss data-protection laws. Do you support custom domains and authentication?Yes. You can configure SPF and

quickly. How can I improve deliverability? Authenticate your domain (SPF/DKIM), keep lists clean, use relevant content and run an anti-spam test before sending

installing SPF, DKIM and DMARC so your emails reach their destination — all included, at no extra cost. QUESTIONS Frequently asked questions What is IP reputation?IP

in marketing regulation. For legitimate senders, the practical defence is authentication. Publishing SPF, DKIM and DMARC records makes it substantially harder

your emails. The relay server takes your messages, checks them, and delivers them securely, ensuring they meet authentication standards such as SPF, DKIM, and

infrastructure Deliverability-first sending Mailpro routes your bulk emails through optimized SMTP servers with proper authentication (SPF, DKIM, DMARC). We handle

; host securely and link. Include a plain-text version: Improves accessibility and deliverability. Authenticate your domain: Set up SPF, DKIM, and DMARC for

and deciding whether to pause or re-engage them. Checking that your SPF, DKIM and DMARC records are correctly set. Sending from verified domains and consistent

wins on personal tone, universal rendering and simplicity. Neither format is "spam-proof". Authentication (SPF, DKIM, DMARC), sender reputation and engagement

authentication protocols: SPF confirms which servers can send emails on your behalf. DKIM adds a digital signature proving the email hasn’t been tampered with. DMARC tells