Using classic Outlook for Windows in business environments
Hi Grace,
Based on what you shared, since the behavior varies, it's necessary to determine whether the issue is caused by the Outlook application, the mail server, a recipient’s mail system, or an attachment-specific restriction. Therefore, please share more details about the situation.
- What is the complete error message or bounce-back code you receive, including any error code?
- How many recipients are included in the group email? Are they members of a distribution list, contact group, or manually entered addresses?
- What are the number, file types, and total size of the attachments?
- Do the attachments appear in the message under Sent Items after sending?
- Are attachments missing for all recipients or only certain recipients or email domains? For example, does it affect only external recipients or one specific company?
- Does the same email send correctly from Outlook on the web? Does the issue occur when sending the attachments to yourself or a single recipient?
I want to make sure I have clear information about the situation and provide appropriate guidance. Should you need further assistance, please feel free to reach out again in the comments on this post. I'm happy to help.
I greatly appreciate your cooperation and understanding.