Exim FAQ: Keyword-in-context index

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Q0072:  ... that involve :include: items, complaining that it can't change gid or uid. Why is this?
Q0601:  ... What does the error Neither the xxx router nor the yyy transport set a uid for local delivery of... mean?
Q0603:  ... through routers that do not set check_local_user be delivered under the uid of the recipient?
Q0041:  What does the message unable to set gid=ddd or uid=ddd (euid=ddd): local delivery to ... transport=ttt mean?
Q0066:  What does the message unable to set gid=xxx or uid=xxx mean?
Q0012:  Exim is unable to route to any remote domains. It doesn't seen to be able to access the...
Q0026:  ... pipe, but it always gives error code 127, with the comment (could mean unable to exec or command does not exist).
Q0041:  What does the message unable to set gid=ddd or uid=ddd (euid=ddd): local delivery to ... transport=ttt...
Q0043:  What does the error Unable to get interface configuration: 22 Invalid argument mean?
Q0065:  ... run Exim with an alternate configuration file, it gives an error about being unable to create a spool file when trying to run an autoreply transport. Why...
Q0066:  What does the message unable to set gid=xxx or uid=xxx mean?
Q0077:  ... However, when I try to read mail from my PC I get connection rejected or unable to connect.
Q0078:  ... logging the unknown SMTP command XXXX from my client hosts, and they are unable to authenticate.
Q0103:  I'm getting an undefined symbol error for hosts_ctl when I try to build Exim. (On some systems this error...
Q0120:  ... compile with LOOKUP_WHOSON, but I keep getting In function `whoson_find': undefined reference to `wso_query'.
Q1302:  ... built with Perl support exits with several error messages of the form undefined reference to `PL_stack_sp'.
Q0040:  How can I stop undeliverable bounce messages (e.g. to routeable, but undeliverable, spammer senders)...
Q0085:  ... rejected EHLO ... syntactically invalid argument(s). I know it's because of the underscore in the host name, but is there a switch to allow Exim to accept mail from...
Q0732:  I would like to either warn or deny when a host uses an underscore in the EHLO command.
Q0053:  Exim on my host responds to a connection with 220 *****... and won't understand EHLO commands.
Q0080:  Am I to understand that the database lookups must only return one value? They can not return...
Q9603:  ... system, causing imap connections to be refused. The imapd in use is Washington Univers 12.250. Could this be anything to do with Exim?
Q0083:  Netscape on Unix is sending messages containing an unqualified user name in the Sender: header line,...
Q0047:  ... of the mail system, I see the message Mailer daemons: exim abandoned: unknown, malformed, or incomplete option -bz sendmail. What does this mean?
Q0054:  I'm getting an Exim configuration error unknown rewrite flag character (m) in line 386 but I haven't used any flags on...
Q0064:  ... it delivers fine, but when I send a message from the mail command, I get User unknown and the mail is saved in dead.letter.
Q0078:  Exim is logging the unknown SMTP command XXXX from my client hosts, and they are unable to authenticate....
Q0314:  ... intermittent problem where attempts to mail to valid sites are rejected with unknown mail domain. This only happens a few times a day and there is no particular...
Q0403:  How do I configure Exim to send messages for unknown local users to a central server?
Q0418:  I want to use a default entry in my alias file to handle unknown local parts, but it picks up the local parts that the aliases generate....
Q0725:  ... the SMTP message is always 550 5.1.1 <user@mydomain.com>... User unknown.
Q0726:  My SMTP authentication can be bypassed by sending an unknown user name and an empty password. What is wrong with this condition in...
Q0736:  ... the connection after a server attempts to send a message to a number of unknown users?
Q0083:  Netscape on Unix is sending messages containing an unqualified user name in the Sender: header line, which Exim is rejecting because I have set...
Q0067:  What does the error too many unrecognized commands mean?
Q0108:  I'm getting an unresolved symbol ldap_is_ldap_url when trying to build Exim.
Q0109:  I'm getting an unresolved symbol mysql_close when trying to build Exim.
Q1708:  ... is running Norton Antivirus, but all my email is being rejected with Unsupported command errors. Why?
Q0701:  How do I block unwanted messages from outside my host?
Q0104:  I'm about to upgrade to a new Exim release. Do I need to ensure the spool is empty, or take...
Q9608:  I'm running Exim 3 under Debian, and want to upgrade to Exim 4. How difficult is it?
Q0414:  ... caseful_local_part on the routers that handle my local domain because my users have upper case letters in their login names, but incoming mail now has to use the...
Q0804:  ... login names into “friendly” names, but if mail comes in for an upper case login name, it doesn't get rewritten.
Q0606:  I'm using tmail to do local deliveries, but when I turned on the use_crlf option on the pipe transport (tmail prefers \r\n terminations) message...
Q0724:  ... see the message on the log, but the response to the remote user is “unknown user”; instead of the message from the alias file. How can I change this?
Q0406:  ... are using the .forward to pipe to a shell command which appends to the user's INBOX. How can I forbid this?
Q0413:  When a user's .forward file is syntactially invalid, Exim defers delivery of all messages to...
Q0605:  If a user's mailbox is over quota, is there a way for me to set it up so that the...
Q0634:  How can I stop a local transport from trying to access the user's home directory, even when the delivery is to a file that is elsewhere?...
Q0008:  If I run ./exim -d -bt user@domain all seems well, but when I send a message from my User Agent, it...
Q0056:  ... are using Exim to send mail from our web server. However, whenever a user sends an email it gets sent with the return path (envelope sender) apache@server_name.com...
Q0064:  ... test@domain it delivers fine, but when I send a message from the mail command, I get User unknown and the mail is saved in dead.letter.
Q0083:  Netscape on Unix is sending messages containing an unqualified user name in the Sender: header line, which Exim is rejecting because I have set verify...
Q0413:  When a user's .forward file is syntactially invalid, Exim defers delivery of all messages...
Q0416:  ... is quickest way to set up Exim so any message sent to a non-existing user would bounce back with a different message, based on the name of non-existing...
Q0425:  ... distributed between several servers according to the first letter of the user name. All the servers receive incoming mail at random. I would like to...
Q0432:  I use NIS for my user data. How can I stop Exim rejecting mail when my NIS servers are being...
Q0511:  ... system filter uses a mail command to send a message, I get the error User 0 set for address_reply transport is on the never_users list. What does...
Q0632:  What does the error User 1 set for local_mbx_delivery transport is on the never_users list mean?...
Q0712:  ... make an ioctl call at the time of the SMTP RCPT command, to check if a user has exceeded their email quota. If they have I issue a temporary failure...
Q0716:  How can I arrange for each user to have a file listing the only sender addresses from which she will accept...
Q0724:  ... addresses is refused, I see the message on the log, but the response to the remote user is “unknown user” instead of the message from the alias file....
Q0725:  ... recipients, but when I test them, the SMTP message is always 550 5.1.1 < user@mydomain.com>... User unknown.
Q0726:  My SMTP authentication can be bypassed by sending an unknown user name and an empty password. What is wrong with this condition in a PLAIN...
Q9804:  We want to be able to temporarily lock out a user by disabling the password and moving the home directory to another place....
Q0411:  Why will Exim deliver a message locally to any username that is longer than 8 characters as long as the first 8 characters match...
Q0411:  ... 8 characters as long as the first 8 characters match one of the local usernames?
Q0729:  How can I screen out addresses that are neither valid usernames or distribution lists on mail being forwarded to an internal Win2K server?...
Q0005:  Why is Exim not rejecting incoming messages addressed to non-existent users at SMTP time?
Q0204:  ... run. I would like to know how to restrict mail which comes from that account to users on that host only.
Q0403:  How do I configure Exim to send messages for unknown local users to a central server?
Q0406:  Some of my users are using the .forward to pipe to a shell command which appends to the...
Q0414:  ... caseful_local_part on the routers that handle my local domain because my users have upper case letters in their login names, but incoming mail now has...
Q0423:  Some of our users have no home directories; the field in the password file contains /no/home/dir. This...
Q0425:  My users' mailboxes are distributed between several servers according to the first...
Q0508:  How can I allow the use of relative paths in users' filter files when the directories concerned are not available from the...
Q0736:  ... connection after a server attempts to send a message to a number of unknown users?
Q5001:  How can I arrange to allow a limited set of users to perform a limited set of Exim administration functions? I don't want to put...
Q9802:  ... sends mail to the outside world only from a restricted list of our local users?
Q9804:  ... home directory to another place. How can we arrange to reject mail for users in this state?
Q9706:  The exiwhat utility isn't working for me on a Solaris 2 system.
Q1501:  The MX records for some UUCP domains point to my local host. How do I get it to pass the messages on...
Q1503:  ... something strange on our system in regards to mail coming in via rmail from a UUCP link. The sender is being set to mailmaster instead of the real sender, and a...

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