![]() Try a TCP Tweak tool, picking a safe setting rather than trying for the fastest connection speed.You can also disable Receive Window Auto-Tuning. It can usually be fixed by updating the routers firmware. ![]() ![]() Vista has a Receive Window Auto-Tuning feature that tweaks RWIN that can fail when used with older routers (especially ADSL routers) and some firewalls.If you have a router its MTU should be set to the same value as your PC. This decreases performance (throughput) but should create a more robust TCP-IP connection. Lower the Maximum Transmission Unit (MTU) used by TCP-IP.If you're not used to tweaking your operating system ask for help in your ISPs forum, or the MozillaZine Tech forum before you do anything. However, be careful changing MTU or RWIN, if you don't know what you're doing you can cripple TCP-IP. Your TCP-IP stack might need tweaking.Its recommended that you don't scan outgoing messages anyways because it frequently causes interoperability problems, and if the recipient doesn't have their own anti-virus program they have bigger things to worry about than your message. Disable any program such as an anti-virus or spyware scanner from scanning outgoing messages.(In 3.x versions the setting is accessible only through the Config Editor - Tools->Options->Advanced->General->Config Editor.) This preference is only available in 1.5 or later. This frequently solves the problem, especially when you have a wireless connection. Increase mailnews.tcptimeout from its default value of 60 seconds to 300 seconds using Tools -> Options -> Advanced -> General -> Connection timeout.If none of the above helps either see the Alternatives section or try: If you do this it will reset what is used to view an attachment with a specific file type to the default values. 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: This article was written for Thunderbird but also applies to Mozilla Suite / SeaMonkey (though some menu sequences may differ).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |