<p>David confirms the issue and has now added a fix for it in the upcoming maintenance release. Thanks for pointing it out!<span style="font-size: 10pt;"> </span></p>

<p>I try to find out, why i get a strange answer of the imapserver from Mercury. A python script checks mails and searches for a part of the mail subject. Here the shortened imap session-log:</p><p><span style="font-size: 10pt;"> </span></p><p>01: << NPNG1 OK LOGIN completed.<cr><lf></p><p>02: >> NPNG2 SELECT 0<cr><lf></p><p>03: << * 1 EXISTS<cr><lf></p><p>04: << * 0 RECENT<cr><lf></p><p>05: << * FLAGS (\Deleted \Draft \Seen \Answered)<cr><lf></p><p>06: << * OK [UNSEEN 1] First unread message<cr><lf></p><p>07: << * OK [UIDVALIDITY 1500594200] UID Validity<cr><lf></p><p>08: << * OK [UIDNEXT 2] Predicted next UID<cr><lf></p><p>09: << * OK [PERMANENTFLAGS (\Deleted \Draft \Seen \Answered)] Settable message flags<cr><lf></p><p>10: << NPNG2 OK [READ-WRITE] SELECT completed.<cr><lf></p><p>11: >> NPNG3 UID SEARCH (SENTSINCE 20-Jul-2017 SUBJECT "Mercury")<cr><lf></p><p>12: << * SEARCH</p><p>13: << <cr><lf></p><p>14: << NPNG3 OK SEARCH complete.<cr><lf> </p><p> </p><p><span style="font-size: 13.3333px;">Login and selecting the imap-folder "0" are okay until line 11. The problem seems to be either the search string in line 11 </span><span style="font-size: 13.3333px;">or the imapserver is waiting for something. Line 6 of the log lists an unseen message. The string "Mercury" is a part of the mail subject. Therefor line 12 should display an other answer.</span></p>

<p>Please copy all headers from the CNM file with the message that wasn't found and we'll check it out!</p>

<p>I had a long telnet session last night and i found the problem. According to thread http://community.pmail.com/forums/post/138.aspx the command SENTSINCE (part 6.4.4) should be:</p> <p><span style="font-family: 'courier new', courier; font-size: 12.096px;">SENTSINCE <date></span><br style="font-family: 'courier new', courier; font-size: 12.096px;"><span style="font-family: 'courier new', courier; font-size: 12.096px;">         Messages whose [RFC-2822] Date: header (disregarding time and</span><br style="font-family: 'courier new', courier; font-size: 12.096px;"><span style="font-family: 'courier new', courier; font-size: 12.096px;">         timezone) is within or later than the specified date.</span></p> <p>But SENTSINCE searches only for later than the specified date:</p> <p>SEARCH SENTSINCE 22-Jul-2017</p><p>* SEARCH 4711</p><p>OK SEARCH complete.</p><p> </p><p>SEARCH SENTSINCE 23-Jul-2017</p><p>* SEARCH <NUL></p><p>OK SEARCH complete.</p><b style="margin: 0px; padding: 0px; border: 0px; font-size: 13px; color: rgb(102, 102, 102); font-family: 'Trebuchet MS', Arial, sans-serif; background-color: rgb(252, 253, 254);"> <span style="margin: 0px; padding: 0px; border: 0px; font-size: 13px; font-family: 'Trebuchet MS', Arial, sans-serif; background-color: rgb(252, 253, 254); color: rgb(255, 0, 0);"></span></b>

OK. What was the Date: header in the test message?

Date: Sun, 23 Jul 2017 10:35:56 +0200

[add]

UID SEARCH (SENTSINCE 23-Jul-2017 SUBJECT "Mercury")
* SEARCH <NUL>
OK SEARCH complete.
UID SEARCH (SENTSINCE 22-Jul-2017 SUBJECT "Mercury")
* SEARCH 12345
OK SEARCH complete.

<pre>Date: Sun, 23 Jul 2017 10:35:56 +0200</pre><pre> </pre><pre>[add]</pre><pre>UID SEARCH (SENTSINCE 23-Jul-2017 SUBJECT "Mercury") * SEARCH <NUL> OK SEARCH complete. UID SEARCH (SENTSINCE 22-Jul-2017 SUBJECT "Mercury") * SEARCH 12345 OK SEARCH complete. </pre><div> </div><div>[add2]</div><div>Now a retest with SENTON:</div><div> </div><div>UID SEARCH (SENTON 23-Jul-2017 SUBJECT "Mercury")</div><div>* SEARCH 12345</div><div>OK SEARCH complete.</div>