Hi. We noticed that the troubleshooting information was missing from these questions. In order to better investigate this issue, we may need to request a little more non-personal information.

Please add the troubleshooting information to your post as well as the results of the following troubleshooting steps:

• Finding the Troubleshooting information
• Does Thunderbird work in TB Safe mode (see Thunderbird Safe Mode)?
• What is the Thunderbird version?
• What operating system do you use (e.g. Windows 7)?
• Do you use anti-virus and firewall software? What is the version?
• Do you use Thunderbird add-ons?
• Who is the email provider?
• Who is the internet provider?
• What is the exact error message?
• What steps did you take right before this happened?

With this information we can better investigate and get a better idea of what may be causing the issue.

Please post back with this information and any other questions you might have.

Hi, here are my responses:

I haven't had a chance to try safe mode since I don't have any unsent messages to experiment with now.

Thunderbird version 31.5.0

I use Windows 7

I use MIcrosoft Essentials and Webroot for my virus software

I believe the error message is "checking for attachments"

The steps I took are to uncheck the box in settings that tells Thunderbird not to check for attachments.

I hope this helps, and thanks again.

My email provider is Comcast for one email account and GoDaddy for another

This didn't help a bit. Would you please submit the data I asked about.

I'm sorry, I thought I answered each of your questions. Maybe I missed something - what specific data are you looking for. Thank you.

First make sure you unchecked the box for this option.

From the menu bar select Tools-Options-Composition Check for Missing Attachments

You may need to restart Thunderbird to make this option take effect.

If still having problems take a look in the Config Editor to see if the option is set there.

Tools-Options-Advanced-General Select Config Editor and promise to be careful

Enter attach in the search box Look for a line Mail.Compose.Attachment.Reminder If changed from the default of True to False it should be bolded.

If still showing true, right click and select Toggle to change to False.

Restart Thunderbird

"Please add the troubleshooting information to your post ......... Finding the Troubleshooting information

thanks

Airmail, thanks - the box was unchecked and the line under the config settings was bolded like you said it should be. I have restarted Thunderbird and the problem still persists.

Gnospen, my bad, I see now. The data is listed below:

Troubleshooting Information This page contains technical information that might be useful when you're trying to solve a problem. If you are looking for answers to common questions about Firefox, check out our support website. Application Basics Name Firefox Version 36.0.1 Update History User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:36.0) Gecko/20100101 Firefox/36.0 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Multiprocess Windows 0/1 Crash Reports for the Last 3 Days Report ID Submitted

All Crash Reports (including 2 pending crashes in the given time range) Extensions Name Version Enabled ID RealDownloader 17.0.15 false {338950EA-82DB-44C1-930D-0C28E023C9F0} RealPlayer Browser Record Plugin 15.0.6 false {0153E448-190B-4987-BDE1-F256CADA672F} SmartPrintButton 1.0 false [email protected] Webroot Filtering Extension 1.1.0.57 false [email protected] Graphics Adapter Description NVIDIA GeForce 6150SE nForce 430 Adapter Drivers nvd3dumx,nvd3dum Adapter RAM 256 Device ID 0x03d0 DirectWrite Enabled false (6.2.9200.16571) Driver Date 1-31-2013 Driver Version 9.18.13.783 GPU #2 Active false GPU Accelerated Windows 0/1 Basic (OMTC) Blocked for your graphics card because of unresolved driver issues. Subsys ID 01811025 Vendor ID 0x10de WebGL Renderer Google Inc. -- ANGLE (NVIDIA GeForce 6150SE nForce 430 Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote true AzureCanvasBackend skia AzureContentBackend cairo AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0 Important Modified Preferences Name Value browser.cache.disk.capacity 358400 browser.cache.disk.smart_size.first_run false browser.cache.frecency_experiment 1 browser.places.smartBookmarksVersion 7 browser.sessionstore.upgradeBackup.latestBuildID 20150305021524 browser.startup.homepage http://www.drudgereport.com/ browser.startup.homepage_override.buildID 20150305021524 browser.startup.homepage_override.mstone 36.0.1 dom.mozApps.used true extensions.lastAppVersion 36.0.1 media.gmp-gmpopenh264.lastUpdate 1425701198 media.gmp-gmpopenh264.version 1.3 media.gmp-manager.lastCheck 1425908968 network.cookie.prefsMigrated true places.database.lastMaintenance 1425908402 places.history.expiration.transient_current_max_pages 100647 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true privacy.sanitize.migrateFx3Prefs true storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1425701988 Important Locked Preferences Name Value JavaScript Incremental GC true Accessibility Activated true Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.10.7 4.10.7 NSS 3.17.4 Basic ECC 3.17.4 Basic ECC NSSSMIME 3.17.4 Basic ECC 3.17.4 Basic ECC NSSSSL 3.17.4 Basic ECC 3.17.4 Basic ECC NSSUTIL 3.17.4 3.17.4 Experimental Features Name ID Description Active End Date Homepage

Great, just that this is FireFox info.

Sorry, here you go!

 Application Basics

   Name: Thunderbird
   Version: 31.5.0
   User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0
   Profile Folder: Show Folder

             (Local drive)
   Application Build ID: 20150222233048
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, , (pop3) pop.att.yahoo.com:995, SSL, passwordCleartext
     OUTGOING: mail.bellsouth.net:25, plain, passwordCleartext, true

   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account4:
     INCOMING: account4, , (pop3) pop.att.yahoo.com:995, SSL, passwordCleartext
     OUTGOING: mail.bellsouth.net:25, plain, passwordCleartext, true

   account5:
     INCOMING: account5, , (pop3) pop.secureserver.net:110, plain, passwordCleartext
     OUTGOING: smtpout.secureserver.net:465, SSL, passwordCleartext, true

   account6:
     INCOMING: account6, , (pop3) mail.comcast.net:995, SSL, passwordCleartext
     OUTGOING: smtp.comcast.net:465, SSL, passwordCleartext, true

   account9:
     INCOMING: account9, , (imap) imap-mail.outlook.com:993, SSL, passwordCleartext
     OUTGOING: smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true

   account10:
     INCOMING: account10, , (imap) imap-mail.outlook.com:993, SSL, passwordCleartext
     OUTGOING: smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true

 Crash Reports

 Extensions
   Manually sort folders, 1.1, true, [email protected]
   Out Of Office, 1.0.3, true, [email protected]

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     browser.zoom.full: true
     extensions.lastAppVersion: 31.5.0
     font.internaluseonly.changed: true
     font.name.monospace.el: Consolas
     font.name.monospace.tr: Consolas
     font.name.monospace.x-baltic: Consolas
     font.name.monospace.x-central-euro: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.tr: Calibri
     font.name.sans-serif.x-baltic: Calibri
     font.name.sans-serif.x-central-euro: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.serif.el: Cambria
     font.name.serif.tr: Cambria
     font.name.serif.x-baltic: Cambria
     font.name.serif.x-central-euro: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.tr: 14
     font.size.fixed.x-baltic: 14
     font.size.fixed.x-central-euro: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.tr: 17
     font.size.variable.x-baltic: 17
     font.size.variable.x-central-euro: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: 13ac85b0-c753-41cf-9571-fb988b973bd
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     network.cookie.prefsMigrated: true
     places.database.lastMaintenance: 1425738888
     places.history.expiration.transient_current_max_pages: 100647
     places.history.expiration.transient_optimal_database_size: 161034730
     plugin.importedState: true
     plugins.update.notifyUser: true
     print.print_printer: hp LaserJet 1300 PCL 5
     print.printer_hp_LaserJet_1300_PCL_5.print_bgcolor: false
     print.printer_hp_LaserJet_1300_PCL_5.print_bgimages: false
     print.printer_hp_LaserJet_1300_PCL_5.print_colorspace:
     print.printer_hp_LaserJet_1300_PCL_5.print_command:
     print.printer_hp_LaserJet_1300_PCL_5.print_downloadfonts: false
     print.printer_hp_LaserJet_1300_PCL_5.print_duplex: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_edge_bottom: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_edge_left: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_edge_right: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_edge_top: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_evenpages: true
     print.printer_hp_LaserJet_1300_PCL_5.print_footercenter:
     print.printer_hp_LaserJet_1300_PCL_5.print_footerleft: &PT
     print.printer_hp_LaserJet_1300_PCL_5.print_footerright: &D
     print.printer_hp_LaserJet_1300_PCL_5.print_headercenter:
     print.printer_hp_LaserJet_1300_PCL_5.print_headerleft: &T
     print.printer_hp_LaserJet_1300_PCL_5.print_headerright: &U
     print.printer_hp_LaserJet_1300_PCL_5.print_in_color: true
     print.printer_hp_LaserJet_1300_PCL_5.print_margin_bottom: 0.5
     print.printer_hp_LaserJet_1300_PCL_5.print_margin_left: 0.5
     print.printer_hp_LaserJet_1300_PCL_5.print_margin_right: 0.5
     print.printer_hp_LaserJet_1300_PCL_5.print_margin_top: 0.5
     print.printer_hp_LaserJet_1300_PCL_5.print_oddpages: true
     print.printer_hp_LaserJet_1300_PCL_5.print_orientation: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_page_delay: 50
     print.printer_hp_LaserJet_1300_PCL_5.print_pagedelay: 500
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_data: 1
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_height: 11.00
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_name:
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_size_type: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_size_unit: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_paper_width: 8.50
     print.printer_hp_LaserJet_1300_PCL_5.print_plex_name:
     print.printer_hp_LaserJet_1300_PCL_5.print_resolution: 155494048
     print.printer_hp_LaserJet_1300_PCL_5.print_resolution_name:
     print.printer_hp_LaserJet_1300_PCL_5.print_reversed: false
     print.printer_hp_LaserJet_1300_PCL_5.print_scaling: 1.00
     print.printer_hp_LaserJet_1300_PCL_5.print_shrink_to_fit: false
     print.printer_hp_LaserJet_1300_PCL_5.print_to_file: false
     print.printer_hp_LaserJet_1300_PCL_5.print_unwriteable_margin_bottom: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_unwriteable_margin_left: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_unwriteable_margin_right: 0
     print.printer_hp_LaserJet_1300_PCL_5.print_unwriteable_margin_top: 0
     privacy.donottrackheader.enabled: true

 Graphics

     Adapter Description: NVIDIA GeForce 6150SE nForce 430
     Vendor ID: 0x10de
     Device ID: 0x03d0
     Adapter RAM: 256
     Adapter Drivers: nvd3dumx,nvd3dum
     Driver Version: 9.18.13.783
     Driver Date: 1-31-2013
     Direct2D Enabled: false
     DirectWrite Enabled: false (6.2.9200.16571)
     ClearType Parameters: ClearType parameters not found
     WebGL Renderer: false
     GPU Accelerated Windows: 0. Blocked for your graphics card because of unresolved driver issues.

     AzureCanvasBackend: skia
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: cairo

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 1
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.10.6
     4.10.6

     NSS
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

     NSS Util
     3.16.2.3
     3.16.2.3

     NSS SSL
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

     NSS S/MIME
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

What anti virus are you using?

The standard message for a missing attachment is That sounds nothing like what your saying. There is also a very passive bar that appears at the bottom of the typing area,which tells me when I type attach "found an attachment keyword: attach" and offers buttons to add an attachment or remind me latter.

However I know McAfee says something about searching for attachments, so what anti virus program?

Thanks Matt, I did get a box similar to like the one you show. I use Microsoft Essentials and Webroot, but don't think that's the problem since the issue is sporadic.

I think I'll try to trick the program by changing my settings back so the program will check for attachments, and then delete all of the keywords. Maybe this will work since nothing else seems to. Thanks!

PS - I tested several emails by sending messages with the words "attach, attached, attachments, etc." in the body and the program lets them go through without checking for attachments now that I've deleted the keywords (see my post just above). Therefore maybe this is a good work around when unchecking the "check for missing attachments" box doesn't work.

Are the messages all your own work, i.e. original messages, not replies or forwards? Im wondering if this "checking for attachments" message might mean it's looking for an attachment in the original message you're replying to or forwarding. Other peoples' signatures are a common source of such things.

Good point, I think it usually if not always occurs with a response or forward. I often have to change or delete the word "attach" from someone else's signature for it to go through.

For me, as of today, this box pops up when trying to send any emails, even with NO ATTACHMENT! Please recommend other email applications to try. Image below of "Adding attachment" box.

Version: Thunderbird 31.5.0 On: MacBook Pro OSX10.9.5 Disabled everything I can find long ago with Thunderbird, it freezes so often...

Please save that email using file save as and forward as an attachment to the email address shown in my profile here https://support.mozilla.org/en-US/user/MattAuSupport so I can see what is in the message source that might cause this.