==> adduser exim
- (3) Now you can prepare to build Exim. Go to \?http://www.exim.org?\ or
+ (3) Now you can prepare to build Exim. Go to \?https://www.exim.org?\ or
one of its mirrors, or the master ftp site
\?ftp://ftp.csx.cam.ac.uk/pub/software/email/exim/exim4?\, and download
\(exim-4.20.tar.gz)\ or whatever the current release is. Then:
to enable my clients to use TLS. However, clients other than Exim
refuse to accept this certificate. What's wrong?
-A1701: It seems that some clients require that the certificate presented by
- the server be a user (also called ``leaf'' or ``site'') certificate, and not
- a self-signed certificate. In this situation, the self-signed
- certificate must be installed on the client as a trusted root
- \*certification authority*\ (CA), and the certificate used by the server
- must be a user certificate signed with that self-signed certificate.
+A1701: Don't use a self-signed certificate today. Use a certificate from a
+ certificate authority, whether your own private certificate authority or
+ a free CA such as Let's Encrypt.
- For information on creating self-signed CA certificates and using them
- to sign user certificates, see the \*General implementation overview*\
- chapter of the Open-source PKI book, available online at
- \?http://ospkibook.sourceforge.net/?\. Here is a quick overview. First,
- read this message:
-
- \?http://www.FreeBSD.org/cgi/mid.cgi?id=3C3F3A93.C1ECF9B0%40mindspring.com?\
-
- Then, follow the instructions found on these two (consecutive) pages:
-
- \?http://ospkibook.sourceforge.net/docs/OSPKI-2.4.6/OSPKI/initialisation.htm?\
- \?http://ospkibook.sourceforge.net/docs/OSPKI-2.4.6/OSPKI/keygensign.htm?\
-
- Two points on the PKI Book literature:
-
- (1) It's assumed that it's okay to use a passphrase-protected key to
- encrypt the user/site/leaf certificate. If this isn't acceptable,
- you seem to be able to strip out the passphrase as follows:
-
-==> openssl rsa -in user.key -our user.key.new
- mv user.key.new
-
- This should be done immediately after \(user.key)\ is created.
-
- (2) The \*sign.sh*\ script is available in the \*mod_ssl*\ distribution,
- available at \?http://www.modssl.org/source/?\.
-
- Having followed the instructions, you end up with the following files:
-
- (a) \(ca.crt)\
-
- This file should be installed into the client software as a trusted
- root certification authority. In Windows XP, this can be done as follows:
-
- \#\#Call the file \(ca_cert.cer)\
- [[br]]
- \#\#Double-click on the file
- [[br]]
- \#\#"Install Certificate";
- [[br]]
- \#\#"Next"
- [[br]]
- \#\#"Place all certificates in the following store"
- [[br]]
- \#\#"Browse..."
- [[br]]
- \#\#"Trusted Root Certification Authorities"
- [[br]]
- \#\#"OK"
- [[br]]
- \#\#"Next"
- [[br]]
- \#\#"Finish"
- [[br]]
- \#\#"Yes"
- [[br]]
- \#\#"OK"
-
- (b) \(user.crt)\ and \(user.key)\
-
- These files should be installed into the server software. In Exim, this
- can be done by adding these lines to the configuration file:
-
-==> tls_certificate = /usr/local/etc/exim/tls_cert
- tls_privatekey = /usr/local/etc/exim/tls_key
-
- Then install \(user.crt)\ and \(user.key)\ under the names \(tls_cert)\
- and \(tls_key)\ in the appropriate directory.
+ The exim.org setup uses Let's Encrypt, using the lego tooling and a small
+ shell wrapper to let the certificates be automatically renewed via cron.
+ \?https://github.com/xenolf/lego?\
Q1702: How can I arrange for Exim to advertise support for SMTP authentication
only when the session is encrypted?
C042: ``Since the Exim 4 configuration needed to get Mailman to work differs a
little bit from Exim 3 and since I still haven't seen a recipe for
Mailman with Exim 4, I'm providing my configuration (based heavily on
- \?http://www.exim.org/howto/mailman.html?\).''
+ \?https://www.exim.org/howto/mailman21.html?\).''
C043: ``Attached is an Exim 4 config file which is designed for an Exim server
that is put in front of an Exchange 5.5 system but which verifies the
projects / exim.git / blobdiff