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<h1>Exim FAQ: Keyword-in-context index</h1>
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<td align="right"><a name="TOC245" href="FAQ_7.html#TOC245">Q0712</a>: I've </td>
<td align="left"><font color="#FF0A0A">hacked</font> sendmail to make an ioctl call at the time of the SMTP RCPT command, to...</td>
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<td align="right"><a name="TOC400" href="FAQ_26.html#TOC400">Q9707</a>: How do I stop Sun's <i>dtcm</i> from </td>
<td align="left"><font color="#FF0A0A">hanging</font>? </td>
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<td align="right"><a name="TOC88" href="FAQ_0.html#TOC88">Q0088</a>: The Windows mailer SENDFILE.EXE sometimes </td>
<td align="left"><font color="#FF0A0A">hangs</font> while trying to send a message to Exim 4, and eventually times out. It...</td>
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<td align="right"><a name="TOC62" href="FAQ_0.html#TOC62">Q0062</a>: ... with <b>-bd</b> it crashes. I ran a debugger and discovered that the crash is </td>
<td align="left"><font color="#FF0A0A">happening</font> in the function <i>getservbyname()</i>. What's going on? </td>
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<td align="right"><a name="TOC16" href="FAQ_0.html#TOC16">Q0016</a>: I've set <tt>verify = </tt></td>
<td align="left"><tt><font color="#FF0A0A">header</font>_syntax</tt> in my ACL, but this causes Exim to complain about header lines like <tt>To:...</tt></td>
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<td align="right"><a name="TOC52" href="FAQ_0.html#TOC52">Q0052</a>: What does <i>ridiculously long message </i></td>
<td align="left"><i><font color="#FF0A0A">header</font></i> in an error report mean? </td>
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<td align="right"><a name="TOC83" href="FAQ_0.html#TOC83">Q0083</a>: ... is sending messages containing an unqualified user name in the <i>Sender:</i> </td>
<td align="left"><font color="#FF0A0A">header</font> line, which Exim is rejecting because I have set <tt>verify = header_syntax</tt>....</td>
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<td align="right"><a name="TOC87" href="FAQ_0.html#TOC87">Q0087</a>: ... address: xx@yy may not follow <xx@yy> : failing address in "from" </td>
<td align="left"><font color="#FF0A0A">header</font></i> mean? </td>
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<td align="right"><a name="TOC194" href="FAQ_5.html#TOC194">Q0512</a>: I'm trying to reference the <i>Envelope-To:</i> </td>
<td align="left"><font color="#FF0A0A">header</font> in my filter, but <i>$h_envelope-to:</i> is always empty. </td>
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<td align="right"><a name="TOC213" href="FAQ_6.html#TOC213">Q0616</a>: Can Exim add a <i>Content-Length:</i> </td>
<td align="left"><font color="#FF0A0A">header</font> to messages it delivers? </td>
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<td align="right"><a name="TOC285" href="FAQ_9.html#TOC285">Q0902</a>: Is it possible to have Exim add a </td>
<td align="left"><font color="#FF0A0A">header</font> to only certain local parts of outgoing mail? </td>
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<td align="right"><a name="TOC286" href="FAQ_9.html#TOC286">Q0903</a>: How can I remove some part of the <i>Received:</i> </td>
<td align="left"><font color="#FF0A0A">header</font>? </td>
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<td align="right"><a name="TOC287" href="FAQ_9.html#TOC287">Q0904</a>: How I can insert the PGP </td>
<td align="left"><font color="#FF0A0A">header</font> line using Exim filters? </td>
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<td align="right"><a name="TOC303" href="FAQ_12.html#TOC303">Q1202</a>: ... Will it check the source address against RBL? Or will it check the <i>From:</i> </td>
<td align="left"><font color="#FF0A0A">header</font>? </td>
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<td align="right"><a name="TOC320" href="FAQ_15.html#TOC320">Q1503</a>: ... is being set to mailmaster instead of the real sender, and a <i>Sender:</i> </td>
<td align="left"><font color="#FF0A0A">header</font> is being added to the message. </td>
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<td align="right"><a name="TOC409" href="FAQ_27.html#TOC409">Q9806</a>: How do I get exim not to add a <i>Sender:</i> </td>
<td align="left"><font color="#FF0A0A">header</font> to locally originated mail? </td>
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<td align="right"><a name="TOC16" href="FAQ_0.html#TOC16">Q0016</a>: I've set <tt>verify = </tt></td>
<td align="left"><tt><font color="#FF0A0A">header_syntax</font></tt> in my ACL, but this causes Exim to complain about header lines like <tt>To: Work: Jim...</tt></td>
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<td align="right"><a name="TOC83" href="FAQ_0.html#TOC83">Q0083</a>: ... <i>Sender:</i> header line, which Exim is rejecting because I have set <tt>verify = </tt></td>
<td align="left"><tt><font color="#FF0A0A">header_syntax</font></tt>. How can I fix this? </td>
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<td align="right"><a name="TOC10" href="FAQ_0.html#TOC10">Q0010</a>: Exim puts <i>for <<i>address</i>></i> in the <i>Received:</i> </td>
<td align="left"><font color="#FF0A0A">headers</font> of some, but not all, messages. Is this a bug? </td>
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<td align="right"><a name="TOC19" href="FAQ_0.html#TOC19">Q0019</a>: ... problem in the string expansion code: it doesn't recognize references to </td>
<td align="left"><font color="#FF0A0A">headers</font> such as <tt>${h_to}</tt>. </td>
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<td align="right"><a name="TOC61" href="FAQ_0.html#TOC61">Q0061</a>: What does the error <i>Too many “Received” </i></td>
<td align="left"><i><font color="#FF0A0A">headers</font> - suspected mail loop</i> mean? </td>
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<td align="right"><a name="TOC284" href="FAQ_9.html#TOC284">Q0901</a>: I would like add some custom </td>
<td align="left"><font color="#FF0A0A">headers</font> to selected outgoing mail based on a specific domain and the subject line....</td>
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<td align="right"><a name="TOC288" href="FAQ_9.html#TOC288">Q0905</a>: I know I can use a system filter to replace certain </td>
<td align="left"><font color="#FF0A0A">headers</font> in messages, but how can I add text to existing headers? I want to add...</td>
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<td align="right"><a name="TOC351" href="FAQ_19.html#TOC351">Q5016</a>: ... line. It is a spam message with the same address in both the <i>From:</i> and the <i>To:</i> </td>
<td align="left"><font color="#FF0A0A">headers</font>. How can this happen, and why doesn't Exim reject it? </td>
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<td align="right"><a name="TOC268" href="FAQ_7.html#TOC268">Q0735</a>: How can I block non-FQDNs in </td>
<td align="left"><font color="#FF0A0A">HELO/EHLOs</font>? </td>
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<td align="right"><a name="TOC293" href="FAQ_10.html#TOC293">Q1004</a>: I just wondered if it might be helpful to put the </td>
<td align="left"><font color="#FF0A0A">hints</font> database on a RAM disk during regular operation. Did anybody try that...</td>
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<td align="right"><a name="TOC36" href="FAQ_0.html#TOC36">Q0036</a>: Why do I get the error <i>Permission denied: creating lock file </i></td>
<td align="left"><i><font color="#FF0A0A">hitching</font> post</i> when Exim tries to do a local delivery? </td>
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<td align="right"><a name="TOC352" href="FAQ_19.html#TOC352">Q5017</a>: ... message delivery purely in memory, that is, it is handled without it ever </td>
<td align="left"><font color="#FF0A0A">hitting</font> the disk? </td>
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<td align="right"><a name="TOC171" href="FAQ_4.html#TOC171">Q0425</a>: ... file for all the servers, which does local delivery for the mailboxes it </td>
<td align="left"><font color="#FF0A0A">holds</font>, and sends other addresses to the correct other server. Is this possible?...</td>
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<td align="right"><a name="TOC211" href="FAQ_6.html#TOC211">Q0614</a>: After the </td>
<td align="left"><font color="#FF0A0A">holidays</font> my ISP has always hundreds of e-mails waiting for me. These are forced...</td>
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<td align="right"><a name="TOC16" href="FAQ_0.html#TOC16">Q0016</a>: ... causes Exim to complain about header lines like <tt>To: Work: Jim <jims@email>, </tt></td>
<td align="left"><tt><font color="#FF0A0A">Home</font>: Bob <bobs@email></tt> which look all right to me. Is this a bug? </td>
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<td align="right"><a name="TOC163" href="FAQ_4.html#TOC163">Q0417</a>: ... automatically, so that people could just create a <i>.vacation.msg</i> file in their </td>
<td align="left"><font color="#FF0A0A">home</font> directory and not have to edit their <i>.forward</i> file? </td>
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<td align="right"><a name="TOC169" href="FAQ_4.html#TOC169">Q0423</a>: Some of our users have no </td>
<td align="left"><font color="#FF0A0A">home</font> directories; the field in the password file contains <i>/no/home/dir</i>. This causes the error...</td>
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<td align="right"><a name="TOC231" href="FAQ_6.html#TOC231">Q0634</a>: How can I stop a local transport from trying to access the user's </td>
<td align="left"><font color="#FF0A0A">home</font> directory, even when the delivery is to a file that is elsewhere? </td>
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<td align="right"><a name="TOC407" href="FAQ_27.html#TOC407">Q9804</a>: ... temporarily lock out a user by disabling the password and moving the </td>
<td align="left"><font color="#FF0A0A">home</font> directory to another place. How can we arrange to reject mail for users...</td>
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<td align="right"><a name="TOC11" href="FAQ_0.html#TOC11">Q0011</a>: Instead of <i>exim_dbmbuild</i>, I'm using a </td>
<td align="left"><font color="#FF0A0A">homegrown</font> program to build DBM (or cdb) files, but Exim doesn't seem to be able...</td>
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<td align="right"><a name="TOC276" href="FAQ_8.html#TOC276">Q0801</a>: How can I get Exim to strip the </td>
<td align="left"><font color="#FF0A0A">hostname</font> from the sender's address? </td>
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<td align="right"><a name="TOC277" href="FAQ_8.html#TOC277">Q0802</a>: I have Exim configured to remove the </td>
<td align="left"><font color="#FF0A0A">hostname</font> portion of the domain on outgoing mail, and yet the hostname is present...</td>
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<td align="right"><a name="TOC96" href="FAQ_1.html#TOC96">Q0103</a>: I'm getting an <i>undefined symbol</i> error for </td>
<td align="left"><tt><font color="#FF0A0A">hosts_ctl</font></tt> when I try to build Exim. (On some systems this error is <i>undefined reference...</i></td>
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<td align="right"><a name="TOC410" href="FAQ_27.html#TOC410">Q9807</a>: ... have messages sent to a specific local address delayed by - say - 24 </td>
<td align="left"><font color="#FF0A0A">hours</font>? </td>
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<td align="right"><a name="TOC378" href="FAQ_22.html#TOC378">Q9301</a>: I'm trying to compile on an </td>
<td align="left"><font color="#FF0A0A">HP</font> machine and I don't have <i>gcc</i> there. So I put <tt>CC=cc</tt> in the <i>Local/Makefile</i>,...</td>
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<td align="right"><a name="TOC118" href="FAQ_2.html#TOC118">Q0204</a>: Every system has a <tt>nobody</tt> account under which </td>
<td align="left"><font color="#FF0A0A">httpd</font> etc run. I would like to know how to restrict mail which comes from that...</td>
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<td align="right"><a name="TOC211" href="FAQ_6.html#TOC211">Q0614</a>: After the holidays my ISP has always </td>
<td align="left"><font color="#FF0A0A">hundreds</font> of e-mails waiting for me. These are forced down Exim's throat in one...</td>
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<td align="right"><a name="TOC363" href="FAQ_19.html#TOC363">Q5028</a>: When I </td>
<td align="left"><font color="#FF0A0A">HUP</font> the Exim daemon, the name shown in the process table changes from <i>/usr/lib/sendmail</i>...</td>
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