Hi, I am writing to report an issue with SquirrelMail 1.4.23-svn. We have a Linux server with the following environment : 1. Apache/2.4.39 with OpenSSL/1.1.1l 2. PHP 7.3.4 3. squirrelmail-20190221_0201-SVN.locales.tar.bz2 4. Six SquirrelMail plugins compatibility-2.0.16-1.0 html_mail-2.3-1.4 tnef_decoder-1.0-1.4.0 undelete-2.0-1.4.0 view_as_html-3.8 vlogin-3.10.2-1.2.7 5. access two IMAP servers one runs "Panda IMAP 2010.417" (built from Alpine-2.26 package) one runs "Microsoft Exchange IMAP4" This copy of SquirrelMail works perfectly. Recently, we upgraded SquirrelMail to "squirrelmail-20230725_0200-SVN.stable.tar.bz2". Exactly the same configurations are applied to the new tree. The "<path to squirrelmail>/src/configtest.php" reports no error. Users login are successful but the right frame shows the following error : # Connect to Panda IMAP > ERROR: Bad or malformed request. > Query: FETCH 1,32 (FLAGS UID RFC822.SIZE INTERNALDATE BODY.PEEK[HEADER.FIELDS > (Date To Cc From Subject X-Priority Importance Priority Content-Type )]) > Server responded: Syntax error in header fields # Connect to Microsoft Exchange > ERROR: Bad or malformed request. > Query: FETCH > 23448:23449,23537,24173,24213,24402,24433,24452,24468,24505,24637,24673:24676 > (FLAGS UID RFC822.SIZE INTERNALDATE BODY.PEEK[HEADER.FIELDS (Date To Cc From > Subject X-Priority Importance Priority Content-Type )]) > Server responded: Command Argument Error. 11 We then replicate the SquirrelMail installation on another server : 1. Apache/2.4.56 OpenSSL/3.1.0 2. PHP 8.1.17 3. squirrelmail-20230725_0200-SVN.stable.tar.bz2 4. no SquirrelMail plugins This copy of SquirrelMail has the same problem as described above. Please kindly advise. ----- squirrelmail-users mailing list Posting guidelines: http://squirrelmail.org/postingguidelines List address: squirrelmail-users@xxxxxxxxxxxxxxxxxxxxx List archives: http://news.gmane.org/gmane.mail.squirrelmail.user List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-users