MaxSender

Send large, personalized campaigns through your own SMTP server—on Mac and iPad. Import millions of recipients, throttle sends, pause/resume, and keep data on your device

MaxSend is a native Mac and iPad app for sending high-volume email through SMTP servers you control. Import huge recipient lists, personalize every message, attach files, and send with live progress—without handing your list to a third-party blast platform.

YOUR SMTP, YOUR DATA Connect any standard SMTP server (SSL/TLS on port 465 or STARTTLS on 587). Passwords stay in the system Keychain—never in the database. Campaigns, recipients, and message content are stored locally on your device. When you send, mail goes only to your configured server.

BUILT FOR SCALE • Stream-import CSV files with millions of rows • Paste or import leads; searchable, paginated recipient list • Automatic deduplication per campaign • Fast SQLite storage with resumable sending—quit the app and pick up where you left off

COMPOSE LIKE A PRO • Plain-text and HTML bodies with live preview (images and colors) • Formatting toolbar: bold, italic, headings, links, images, text color • Merge fields: {{firstName}}, {{email}}, {{company}}, and fallbacks like {{name|there}} • From, Reply-To, Cc, and Bcc • File attachments

SEND WITH CONTROL • Test SMTP connection before you launch • Adjustable connections, max messages/second, and retries • Live throughput, ETA, and per-recipient status • Pause, resume, or stop anytime • Recent failure log with copyable errors

DELIVERABILITY GUIDANCE MaxSend focuses on well-formed MIME, pacing, and responsible sending. Inbox placement still depends on your domain’s SPF, DKIM, DMARC, list quality, and reputation. The in-app Deliverability guide explains how to improve results legally and sustainably.

RESPONSIBLE USE Use MaxSend only for mail recipients expect—newsletters, transactional notices, and permission-based outreach. Comply with CAN-SPAM, GDPR, CASL, and local law. MaxSend does not bypass spam filters.

FEATURES AT A GLANCE • macOS and iPadOS native SwiftUI app • Multiple SMTP accounts (Keychain-secured) • Campaign workflow: Compose → Recipients → Send • CSV column mapping and email validation • Light, purple, and dark themes • Terms of Service and Privacy Policy in-app

Requirements: macOS 14.6 or later and iPadOS 17 or later. An SMTP account from your provider or IT team is required. https://maxsend-macos.github.io/maxsend/terms.html