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BCC recipients showing up in Envelope-to:

Michael-Inet
Before I submit a bug, checking with the community ... From both Drupal and KMail an email from/through one of my WHN/cPanel servers with: From: xyz@[domain] To: xyz@[domain] BCC: test-user1@[mydomain] BCC: test-user2@[mydomain] Are showing all BCCs in the email Envelope-to: headers upon receipt, e.g.: Return-path: xyz@[domain] Envelope-to: test-user1@[mydomain], test-user2@[mydomain] Delivery-date: Fri, 28 Jul 2017 12:05:58 -0400 Received: from [cPanel account] by [cPanel server] with local (Exim 4.89) (envelope-from ) id [removed]; Fri, 28 Jul 2017 12:05:58 -0400 Is this a bug?

Comments

4 comments

Date Votes
  • cPanelMichael
    Hello Michael, It's possible the BCC address was transmitted by the email client (or the script using sendmail). Here's a link that explains this further: Q5004 " Exim/exim Wiki " GitHub Could you verify if you can reproduce this behavior from a different email client (e.g. Outlook, Thunderbird)? Also, what version of cPanel is installed on the system? Thank you.
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  • Michael-Inet
    Hi Michael, > From both Drupal and KMail It's doing it with both KMail and through a Drupal 7 site hosted on the server. Further testing seems to confirm that sending to 2 emails to an off box domain, does not have the issue. Definite "maybe" though, the mails went through MS and a chain of outlook.com servers and my skills understanding "Received: from" headers are not the best, but there weren"t both of the recipients in one mail, so... So, it tentatively seems explicitly an issue with sending to multiple BCCs to a single domain hosted upon WHM/cPanel. The cPanel install is set for auto-update. Exim was just updated (21-Jun-2017). The only real box abnormality is PHP is stuck at an older version for comparability reasons. Probably more than you want ;) but pasting version info below. Best, Michael >>Edit: I actually don"t know how to get the cPanel version number, copy/pasting stuff... CENTOS 6.9 x86_64 virtuozzo " srv04 cPanel & WHM 64.0 (build 36) Change Log for 64.0.36 Entry: 2017-07-25, 17:30 (UTC) Edit:<< Exim version 4.89 #1 built 21-Jun-2017 15:43:43 Copyright (c) University of Cambridge, 1995 - 2017 (c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2017 Berkeley DB: Berkeley DB 4.7.25: (September 12, 2013) Support for: crypteq iconv() IPv6 PAM Perl OpenSSL Content_Scanning DKIM DNSSEC Event OCSP PRDR Experimental_SPF Experimental_SRS Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch dbm dbmjz dbmnz dnsdb passwd sqlite Authenticators: cram_md5 dovecot plaintext spa Routers: accept dnslookup ipliteral manualroute queryprogram redirect Transports: appendfile/maildir autoreply lmtp pipe smtp CentOS release 6.9 (Final) Linux [removed] 2.6.32-042stab120.18 #1 SMP Fri Jan 13 10:32:04 MSK 2017 x86_64 x86_64 x86_64 GNU/Linux Server version: Apache/2.2.27 (Unix) Server built: Aug 27 2014 20:57:01 Cpanel::Easy::Apache v3.26.6 rev9999 PHP 5.3.29 (cli) (built: Aug 27 2014 21:04:20) Copyright (c) 1997-2014 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2014 Zend Technologies with eAccelerator v0.9.6.1-ea, Copyright (c) 2004-2012 eAccelerator, by eAccelerator with the ionCube PHP Loader v4.6.1, Copyright (c) 2002-2014, by ionCube Ltd., and with Zend Guard Loader v3.3, Copyright (c) 1998-2010, by Zend Technologies # kmail -v Qt: 3.5.0 TDE: R14.0.4 KMail: 1.9.10 (enterprise35 0.20100827.1168748) Drupal core version: 7.56 Mass Contact (mass_contact) 7.x-1.1 Mime Mail (mimemail) 7.x-1.0 Token (token) 7.x-1.7
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  • cPanelMichael
    So, it tentatively seems explicitly an issue with sending to multiple BCCs to a single domain hosted upon WHM/cPanel.

    Exim will not remove the "BCC" entry from the message header for incoming SMTP or command-line mail if it's included by the email client. Thus, it's likely the behavior you notice is by-design. This is explained in more-detail on the following URL: Q5004 " Exim/exim Wiki " GitHub Feel free to open a support ticket using the link in my signature if you'd like us to verify that's what's happening on the affected system. Thank you.
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  • Michael-Inet
    Thanks for the info Michael, If that's how Exim works, then that's how it works... *shrug* It only seems to happen if it's on box, so probably not worth any more time figuring out.
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