D. J. Bernstein
serialmail is discussed on the
serialmail mailing list.
The latest published serialmail package is
What is it?
serialmail is a collection of tools for passing mail across serial
links. It works with
you use qmail to deliver messages to a
maildir, and then serialmail to deliver messages out of the maildir.
serialmail is designed to handle three common types of mail delivery
between a dialup computer and an ISP:
serialmail supports SMTP, including ESMTP PIPELINING, and QMTP.
- Delivery to the ISP. The dialup computer sends all outgoing mail to
- AutoTURN delivery from the ISP. After the dialup computer makes an
SMTP connection to the ISP, it automatically receives an SMTP
connection back from the ISP if there is any new mail for it. This
provides the same power as ETRN but does not require a special
- User-controlled delivery from the ISP. A user with a shell account
can switch from qmail-pop3d to serialmail without pestering the
sysadmin. The user can also decide whether undeliverable messages
should be left for POP retrieval or bounced back to the sender.
for networking. It can also be used
with future UCSPI clients for transparent compression, IPv6, etc.