Fred

Hello, Allow me to clarify please: "Windows 7 Pro, Windows 10 Pro x64" = 2 computers with the issue or 1 computer that was Win 7 & has been upggraded to W10? Simply, on many compagnies where I installed combo kaspersky/outlook, I must uninstall Kaspersky to work and don't have this issue, no matter version of Windows 10/7 etc. And each times there have attachment. This week I replaced 7 times kaspersky by avast and issue disappears each time. W10 version and build please? 1803 Outlook 2016 port configuration please? 587 smtp Mail send & receive settings: imap 443 or 993 Send/Receive interval? On demand to send, 15 minutes to receive Server Timeouts? No Is sent mail retained on the server? Stay on outbox in local outlook data file Is the issue only with sent mail with attachments? Yes Does every mail with an attachment generate duplications x 30? No all, but almost, yesterday duplication x199 for big size attachment Have you deleted and recreated the email account? Yes same issue Have you tested the issue with another email account? Same issue on almost PC where kaspersky/outlook is installed Have you tested the issue with Windows in safe mode? No Has your router had a factory reset? No, and I will not do that, on différents sites, same issue and not the same router Has the issue always happened or began at a particular time? No At the time the issue began were there any hardware, software, network changes at all in the 48 hours preceeding the issue happening? No If "yes" what changes? Is your mail synced with any other devices, accounts? Yes mobiles devices, Android iOS, but no problems on mobiles devices What is the status of KSC/VPN when the issue occurs? No VPN installed How often does the issue occur? Too often when attachment

Operating system, edition, version, build? Windows 7 Pro, Windows 10 Pro x64 KAV version, patch? Kaspersky Free (unintalled to work) Outlook version? Outlook 2016 Do you have any other Kaspersky software installed? Kaspersky Secure Connection If "yes", please provide name, version, patch? Is Avast installed at the same time as Kaspersky? No Is Outlook accessed via installed application? Yes, Outlook 2016 If "yes", please provide Outlook full name and version? Microsoft Office 2016 Pro Plus If "no" please tell us how Outlook is accessed? Are Kaspersky addons, toolbars installed in Outlook? Yes If "yes", have you tested the issue with the addons/toolbars disabled? Yes How is Outlook configured: protocol and port information? IMAP TLS Is every email sent from Outlook replicated x30? No every time, every mails with attachments Does the issue happen 24x7? Yes Have you uninstalled Outlook, reinstalled Outlook? Yes If "yes", please let us know the procedure you used? Repair / Uninstall and reinstall When the issue happens have you captured any Outlook logs, Kaspersky logs? No For GSI & Windows Logs, how I can send you this file not in public. Privates informations. Thanks

Next from: https://forum.kaspersky.com/index.php?/topic/408520-smtp-problem-with-kaspersky-free-the-recipient-receive-my-mail-30-times-outlook/ Always same problem, and when I uninstall Kaspersky, it's work well. No problem with Avast. So?