I'm using SmarterMail Enterprise Build 7761. I noticed recently that when a MAPI user forwards an email that has an attachment, the recipient of that forwarded email receives the email, but the attachment is missing. The sender's Outlook shows that the email contains the attachment while it is being composed; and after sending, the sender's Sent folder shows the email with the attachment included.
Tests I did (recipient is my Gmail account for these tests, but I have also noticed the problem when the recipient is other users on this same SmarterMail server, and on other mail services as well):
1. Microsoft 365 Outlook Version 2103 (Build 13901.20400 Click-to-Run), MAPI, forward an email containing an attachment: recipient *does not* receive the attachment.
2. Outlook 2019 Version 2103 (Build 13901.20400 Click-to-Run), MAPI, forward an email containing an attachment: recipient *does not* receive the attachment.
3. Outlook 2019 Version 2103 (Build 13901.20400 Click-to-Run), MAPI, create a new email containing an attachment: recipient *does* receive the attachment.
4. Outlook 2019 Version 2103 (Build 13901.20400 Click-to-Run), IMAP/SMTP, forward an email containing an attachment: recipient *does* receive the attachment.
5. Thunderbird 78.9.1 (64-bit), IMAP/SMTP, forward an email containing an attachment: recipient *does* receive the attachment.
Expected behavior: When an email that contains an attachment is forwarded when using MAPI, the recipient of that email receives the email with the attachment.
Actual behavior: When an email that contains an attachment is forwarded when using MAPI, the recipient of that email receives the email without the attachment.
Is anyone else experiencing this same issue, or know what might cause it?
Thanks!