X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/4c04137d73637107669e02b21f890387aaa2ef34..5d5ad9fb16a2511ff2e0e7d4528d399f06f608da:/doc/doc-src/FAQ.src?ds=sidebyside diff --git a/doc/doc-src/FAQ.src b/doc/doc-src/FAQ.src index 1d43cbcd2..e9b865c91 100644 --- a/doc/doc-src/FAQ.src +++ b/doc/doc-src/FAQ.src @@ -408,7 +408,7 @@ A0018: Recall that Exim does not keep separate queues for each domain, but a temporary error. Here are some possibilities: (1) The messages to \(aol.com)\ got put in your queue, but no previous - delivery attempt occured before you did the \-R-\. This might have been + delivery attempt occurred before you did the \-R-\. This might have been because of your settings of \queue_only_load\, \smtp_accept_queue\, or any other option that caused no immediate delivery attempt on arrival. If this is the case, you can try using \-qqR-\ instead of \-R-\. @@ -1538,7 +1538,7 @@ A0089: This was a bad interaction between a change to the Linux kernel and some taken from Exim's change log: When Exim is receiving multiple messages on a single connection, and - spinning off delivery processess, it sets the SIGCHLD signal handling to + spinning off delivery processes, it sets the SIGCHLD signal handling to SIG_IGN, because it doesn't want to wait for these processes. However, because on some OS this didn't work, it also has a paranoid call to \^waitpid()^\ in the loop to reap any children that have finished. Some @@ -1861,8 +1861,8 @@ A0117: Here! This is a contribution from a RedHat user, somewhat edited. On ==> adduser exim - (3) Now you can prepare to build Exim. Go to \?http://www.exim.org?\ or - one of its mirrors, or the master ftp site + (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: @@ -2917,7 +2917,7 @@ Q0419: I have some obsolete domains which people have been warned not to use any more. How can I arrange to delete any mail that is sent to them? A0419: To reject them at SMTP time, with a customized error message, place - statments like this in the ACL: + statements like this in the ACL: ==> deny message = The domain $domain is obsolete domains = lsearch;/etc/exim/obsolete.domains @@ -5122,7 +5122,7 @@ A1001: Splitting the spool directory has most benefit if there are times when up earlier on some types of file system, compared with others. Exim was not designed for handling large queues. If you are in an - enviroment where lots of messages remain on the queue for long periods + environment where lots of messages remain on the queue for long periods of time, consider implementing a back up host to which you pass these messages, so that the main host's queue remains short. You can use \fallback_hosts\ to do this, or a router that is conditional on @@ -5740,82 +5740,14 @@ Q1701: I am trying to set up an Exim server that uses a self-signed certificate 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? @@ -6612,7 +6544,7 @@ Q9604: I get the \*too many open files*\ error especially when a lot of messages land for Majordomo at the same time. A9604: The problem appears to be the number of open files the system can - handle. This is changable by using the proc filesystem. To your + handle. This is changeable by using the proc filesystem. To your \(/etc/rc.d/rc.local)\ file append something like the following: ==> # Now System is up, Modify kernel parameters for max open etc. @@ -7094,7 +7026,7 @@ Samples whose names are of the form Cnnn are Exim configurations; those with names of the form Fnnn are filter file fragments; those with names of the form Lnnn are sample \^^local_scan()^^\ functions, and those with names of thf form Snnn are scripts of various kinds. There are other examples of -\^^local_scan()^^\ functions at a number of web sites (for example, +\^^local_scan()^^\ functions at a number of websites (for example, \?http://marc.merlins.org/linux/exim/sa.html?\). There are gaps in the C and F numbers because I have omitted the Exim 3 samples @@ -7122,7 +7054,7 @@ C037: An elegant way of using ETRN, which does immediate delivery if the host 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