Coming soon
Developer library pack · .NET · C# and VB.NET
Bastion Mail Suite
Send, receive and serve mail from your own code.
Bastion Mail Sdk for POP3, IMAP and SMTP clients, and Bastion Mail Server Sdk for embeddable IMAP, POP3 and SMTP servers — one vendor for both ends of the conversation.
What is in the Bastion Mail Suite
2 libraries, one purchase, one invoice. Each is a complete product in its own right — follow the links for the full detail.
Bastion Mail Sdk
POP3, IMAP and SMTP clients over one MIME engine, with OAuth 2.0 for Gmail and Microsoft 365 and retry-safe sending.
$399 per developer on its own
Bastion Mail Server Sdk
Embeddable IMAP, POP3 and SMTP servers over your own data and users, current to IMAP4rev2, with onward delivery and bounces.
$1,299 per developer on its own
What you save
Single-developer OEM prices.
| Library | 1 developer, OEM |
|---|---|
| Bastion Mail Sdk | $399 |
| Bastion Mail Server Sdk | $1,299 |
| Bought separately | $1,698 |
| Bastion Mail Suite | $1,499 — you save $199 |
Put a complete mail server inside your product and talk to any other server in the world, from one vendor and one API style.
Pack licensing
The Bastion Mail Suite carries the same OEM terms as each library on its own: build it into your product and ship that product to as many customers as you like, on as many machines as they like.
- Royalty-free redistribution inside your own applications
- Desktop, server, cloud and SaaS deployment — no per-server or per-instance fees
- Perpetual licence with 12 months of updates; renewals at 35% of list
- Every build, .NET Framework to .NET 10, and every sample in C# and VB.NET
- Everything in Developer OEM
- $750 per developer
- Everything in Developer OEM
- No developer count to track as the team grows
- Source-code escrow available, priced on request
Launch prices in US dollars. Final pricing is confirmed at release.
Try it properly first
A thirty-day evaluation of every library in the pack. Nothing removed and no limits — you evaluate exactly what you would buy.
Because the trial is the whole product, sales are final, and accepting the terms and conditions of sale is part of completing a purchase. The one exception: report a serious defect and, if we cannot fix it and release an update within thirty days, we refund you in full.
Get notified when the Bastion Mail Suite is released
Tell us what you are building. We will let you know the moment the evaluation is available — and answer plainly whether it fits.