# RPost RMail Email Encryption vs SEPPmail Secure Email Gateway: side-by-side comparison (2026) [RPost RMail Email Encryption](https://cybersectools.com/tools/rpost-rmail-email-encryption) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [Rmail](https://cybersectools.com/companies/rmail). [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) is a commercial [email encryption](https://cybersectools.com/categories/email-encryption) solution by [SEPPmail AG](https://cybersectools.com/companies/seppmail-ag). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | RPost RMail Email Encryption | SEPPmail Secure Email Gateway | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Encryption | Email Encryption | | Verified | No | No | | Deployment type | Cloud | On-Premises | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Rmail | SEPPmail AG | | Headquarters | – | – | ### Use cases and capabilities | | RPost RMail Email Encryption | SEPPmail Secure Email Gateway | |---|---|---| | Encryption | Yes | Yes | | REST API | Yes | – | | TLS | Yes | Yes | | Gateway | – | Yes | | SMTP | – | Yes | | GDPR | – | Yes | | DKIM | – | Yes | | SPF | – | Yes | | DMARC | – | Yes | | PII | – | Yes | | Security Compliance Training | – | Yes | ### Core features **RPost RMail Email Encryption** 10 features listed. Sign in on the page to see them. **SEPPmail Secure Email Gateway** 6 features listed. Sign in on the page to see them. ### Integrations **RPost RMail Email Encryption** 23 integrations listed. Sign in on the page to see them. **SEPPmail Secure Email Gateway** 12 integrations listed. Sign in on the page to see them. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [RPost RMail Email Encryption](https://cybersectools.com/tools/rpost-rmail-email-encryption) fits if you want a cloud product. - [SEPPmail Secure Email Gateway](https://cybersectools.com/tools/seppmail-secure-email-gateway) fits if you need to run it on your own servers. ## RPost RMail Email Encryption vs SEPPmail Secure Email Gateway FAQ Common questions when comparing RPost RMail Email Encryption vs SEPPmail Secure Email Gateway for email encryption. ### What is the difference between RPost RMail Email Encryption and SEPPmail Secure Email Gateway? **RPost RMail Email Encryption**: Email encryption service with automated delivery and compliance tracking, built by Rmail. **SEPPmail Secure Email Gateway**: Built by SEPPmail AG. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes RPost RMail Email Encryption and SEPPmail Secure Email Gateway? **RPost RMail Email Encryption** is made by Rmail. **SEPPmail Secure Email Gateway** is made by SEPPmail AG. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is RPost RMail Email Encryption a good alternative to SEPPmail Secure Email Gateway? Often, yes. RPost RMail Email Encryption and SEPPmail Secure Email Gateway are both Email Encryption products, and both cover Encryption, TLS. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [RPost RMail Email Encryption vs Z1 SecureMail Gateway](https://cybersectools.com/compare/rpost-rmail-email-encryption-vs-zertificon-z1-solutions) - [RPost RMail Email Encryption vs LuxSci](https://cybersectools.com/compare/luxsci-vs-rpost-rmail-email-encryption) - [RPost RMail Email Encryption vs TitanHQ EncryptTitan](https://cybersectools.com/compare/rpost-rmail-email-encryption-vs-titanhq-encrypttitan) - [SEPPmail Secure Email Gateway vs Z1 SecureMail Gateway](https://cybersectools.com/compare/seppmail-secure-email-gateway-vs-zertificon-z1-solutions) - [SEPPmail Secure Email Gateway vs LuxSci](https://cybersectools.com/compare/luxsci-vs-seppmail-secure-email-gateway) - [SEPPmail Secure Email Gateway vs TitanHQ EncryptTitan](https://cybersectools.com/compare/seppmail-secure-email-gateway-vs-titanhq-encrypttitan) ## Alternatives to each - [See all RPost RMail Email Encryption alternatives](https://cybersectools.com/alternatives/rpost-rmail-email-encryption) - [See all SEPPmail Secure Email Gateway alternatives](https://cybersectools.com/alternatives/seppmail-secure-email-gateway) --- Source: https://cybersectools.com/compare/rpost-rmail-email-encryption-vs-seppmail-secure-email-gateway For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/rpost-rmail-email-encryption.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on RPost RMail Email Encryption and SEPPmail Secure Email Gateway: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md