Best SMTP Services for Mac of 2025

Reliable SMTP relay services and email delivery services. You can send and track large volumes of emails with ease using powerful email delivery services. In minutes, integrate and you can start sending. All your email delivery, transactional and email relay needs are covered under one roof. SMTP can deliver whether you need a reliable backend solution or scalable infrastructure to handle large volumes of emails. Reputation Defender, SMTP's proprietary technology, uses big data to proactively monitor and protect your email list health. It also suppresses bad emails from soft and hard bounces in order to protect your IP reputation and domain. This will ensure that your delivery rates and inbox placement gradually improve over time.

Postfix is a mail server developed by Wietse Venema, originally created at IBM research as a viable alternative to the popular Sendmail program, and Wietse continues to enhance and maintain it while working at Google. This robust mail server operates on various UNIX systems including AIX, BSD, HP-UX, IRIX, LINUX, MacOS X, Solaris, and Tru64 UNIX, requiring ANSI C, a POSIX.1 library, and BSD sockets for its functionality. Designed with speed, ease of administration, and security in mind, Postfix features an exterior reminiscent of Sendmail, yet its internal architecture is entirely distinct. Among its key capabilities are the support for multiple SMTP deliveries over a single TLS-encrypted connection, leveraging the existing tlsproxy(8) and scache(8) services, as well as the ability to utilize MySQL stored procedures. Moreover, Postfix implements a gradual degradation feature, allowing a daemon to log warnings and continue operation despite encountering some service issues, rather than terminating abruptly with a fatal error. Additionally, it can set the execute bit on a queue file, which is critical, as failure to do so would prevent any mail from being delivered successfully. This combination of features makes Postfix a versatile choice for mail server management.

EmailSuccess provides high volume email sending with enterprise-level SMTP Servers. EmailSuccess can be used as a Mail Transfer Agent (MTA) for all sizes of senders: ESPs and Marketing Automation Companies. High Performance EmailSuccess, an MTA, is designed to deliver large volumes of email. It gives the business full control over the Speed, Latency and Deliverability parameters. Deliverability Clients must be able to deliver their messages quickly. You must ensure that your email is not blocked by spam filters and lands in your inbox. Advanced Sending Intelligence Optimized delivery through automatic and real-time tuning of email delivery parameters; platform tuning is made easy.

Mailify, a European-based email marketing and SMS software company, is an industry leader. This tool is ideal for companies looking to stand out among the crowd with its innovative features and expert advice. Mailify is a complete solution. It allows you to manage your contacts, segment your database and create email and newsletters. It supports plugins for the most popular platforms such as Wordpress and Google Analytics. Our EmailBuilder is flexible and fast, allowing you add and edit more content than other tools. Smart Templates saves you time by automatically adapting email and newsletter templates. Simply enter your URL to create a dozen templates that are based on it. We have improved features like the Heatmap, Predictive Eye tracking and many more. These features allow you to identify what has caught the eye of your target audience, predict their first impressions, and even track their eye movements.

Sendcrux was founded in 2017 and specializes in email campaigns, with a particular expertise in cold emails. Our performance is what sets us apart, with industry-leading click and open rates. Our success is based on a dedicated, innovative team, a deep understanding audience engagement, and innovative strategies. We consistently outperform our competitors and deliver unparalleled results for clients. We are the first choice for businesses looking for high-impact, effective email marketing solutions. We will elevate your email campaigns and maximize engagement to drive exceptional results. Choose us to have a brighter and more prosperous future in marketing.