Its not clear why this works since its normally used to associate a MIME type with another program, and Thunderbird normally doesn't call another program when it sends a message to the SMTP server. doc attachments and fixed the problem by exiting Thunderbird and deleting the MimeTypes.rdf file in the profile.
A number of users have had problems sending. See if the problem only occurs for a specific file name extension.Check that the attachments filename doesn't contain characters that might cause a problem by renaming it beforehand to use just 7bit ASCII letters.You might also try sending the attachment as a. Send a message with a small attachment with the same file extension to verify your SMTP server is not filtering based on the file extension.Its also possible the problem has nothing to do with the size of the attachment. Try a different SMTP server if one is available.One way to verify that is to send the message using webmail, and see if it has the same problem. Frequently the problem is not your SMTP server, its due to the recipient's email provider imposing a maximum message size.Typically you can assume a email provider supports a 25MB message that has up to 3 attachments. currently has a maximum message size of about 9.8GB, GMX has a maximum message size of 50MB, TimeWarnerCable (a ISP) a maximum message size of 30MB, Gmail, Yahoo, and AOL a maximum message size of 25MB, Zoho a maximum message size of 20MB and Comcast (a ISP) a maximum message size of 15MB. The size of a binary file is increased by about a third when you send it as an attachment due to the base64 encoding. Find out the maximum attachment size the SMTP server supports.Please verify that your SMTP server settings is correct and try again, or else contact your network administrator. The server may be unavailable or is refusing SMTP connections. The message could not be sent because connecting to SMTP server failed. Sometimes you can send a small message successfully, but if you try to send one with a large attachment you get a error message like: Because of this, any attachments sent with the original message are not displayed in Thunderbird’s message pane.This article was written for Thunderbird but also applies to Mozilla Suite / SeaMonkey (though some menu sequences may differ). The file is not recognized by other email clients. This file contains formatting information for messages that use Microsoft’s proprietary TNEF standard and any attachments sent with the original message. When people send messages from incorrectly configured Microsoft Outlook email clients, a file attachment called winmail.dat may be added as an attachment to the message.
#MOZILLA THUNDERBIRD ATTACHMENT PROBLEM INSTALL#
Please install the LookOut plugin for Thunderbird. The attachment may appear as a winmail.dat attachment.
#MOZILLA THUNDERBIRD ATTACHMENT PROBLEM PDF#
Thunderbird users may report that they do not see a PDF attachment. The attachment is normally named invoice_123456789.pdf – and in standard PDF format. Why is this important?Ĭlients may complain that they do no receive invoices sent to them by email. The problem described here is typical for Thunderbird users and the same email, with attachment, forwarded to an Outlook user will not report the same problem. The issue is experienced by Thunderbird users who received PDF invoices sent by Dynamic.Īny PDF sent as an attachment will be treated in this way by Thunderbird. One such problem is the display of the attached PDF in Thunderbird. This is a great time saving feature but sometimes problems occur. Client’s see WINMAIL.DAT attachments in Thunderbird but in Outlook they open fineĭynamic sends invoices and statements to clients’ by email.
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