If you see the following in exim’s main_log:
temporarily rejected RCPT
This indicates that the domain doesn’t exist in /etc/localdomains. Edit the file with your favorite editor and ensure it’s listed there.
At the same time, you’ll want to ensure it isn’t listed in /etc/remotedomains.
Hopefully this will someday be an option in “Tweak Settings”, but in the meantime, you can add DomainKeys records to your customers DNS zones automatically by creating a “hook” which will be run after /scripts/wwwacct (the script behind “Create an Account” in WHM).
You’ll want to create a file called /scripts/postwwwacct, and add the following content:
my %OPTS = @ARGV;
my $user = $OPTS{’user’};
/usr/local/cpanel/bin/domain_keys_installer $user
You’re all set now — there’s nothing else that needs to be done. Note that this only creates the DomainKeys records for new accounts. If you want to create DomainKeys records for all your existing users at once, check out my other article on the topic: http://www.cpaneladmins.com/2009/12/07/install-domainkeys-and-spf-records-for-all-users/
# /usr/local/cpanel/bin/spf_installer USERNAME
I could write up a post on exim commands, but it would take some time, and “Bradthemad” has already done it. With that, the exim cheatsheet.
Error:Bug in Mailman version 2.1.12.cp3
We're sorry, we hit a bug!
Let’s make sure that all other permissions are set properly:
# ./usr/local/cpanel/3rdparty/mailman/bin/check_perms
No problems found
As mailman is working properly on this server, no errors were discovered, but as you’re received the error above, you’ll likely see some errors displayed.
You probably know that you can configure DomainKeys and SPF records in cPanel >> Email Authentication (if you didn’t, there you go 
). If you’d like to confirm that your TXT records are working properly, here are some resources for you:
SPF Record Check – via HTTP
PoliteMail’s SPF Check – outputs a brief breakdown of your records details – the IP addresses permitted in the record, the hostname, and the mailserver name. Then outputs the TXT record it queried.
MXToolBox’s SuperTool – Provides SPF checks, among other useful queries.
SPF Record Check – via email
This is pretty neat – you can send an email to spf-test@openspf.org from the domain you want to test, and it will reject the message, but in that rejection message, you’ll see the results of your test:
spf-test@openspf.org
SMTP error from remote mail server after RCPT TO:
host mailout02.controlledmail.com [72.81.252.18]:
550 5.7.1
SPF Tests: Mail-From Result="pass": Mail From="test@cpaneladmins.com" HELO name="server.cpaneladmins.com" HELO Result="none" Remote IP="12.34.56.78"
DomainKeys Record Check
http://www.mailradar.com/domainkeys/
Other Resources:
OpenSPF.org’s Wizard – If you want to configure SPF records manually, go here. Note that you won’t be able to edit the records via cPanel >> Email Authentication later on, though.
cd /var/cpanel/users
for user in * ; do /usr/local/cpanel/bin/domain_keys_installer $user ; done
for user in * ; do /usr/local/cpanel/bin/spf_installer $user ; done
/usr/local/cpanel/bin/domain_keys_installer USERNAME
If you’re seeing outgoing spam from nobody@your.hostname.tld, you can track it down fairly easily.
In WHM, go to Exim Configuration Editor, then select Advanced Editor. In the first field, paste in:
log_selector = +address_rewrite +all_parents +arguments +connection_reject +delay_delivery +delivery_size +dnslist_defer +incoming_interface +incoming_port +lost_incoming_connection +queue_run +received_sender +received_recipients +retry_defer +sender_on_delivery +size_reject +skip_delivery +smtp_confirmation +smtp_connection +smtp_protocol_error +smtp_syntax_error +subject
You will then see extended logging in /var/log/exim_mainlog. You can simply run
grep cwd=/home /var/log/exim_mainlog
and that will show you the path for any user that is sending email via sendmail through exim. It won’t give you the filename, but at least you’ll have the user/folder name, and you can look through the scripts from there.
Some ISPs will filter or completely block traffic on port 25, so you may want to make another port available to your customers. To configure exim to listen on a secondary port:
Navigate to WHM -> Service Configuration -> Service Manager, then check the box for “exim on another port.” You can use the default secondary port of 26, or enter your own.
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