thunderbird email settings are changed automatically.

Can you explain in more detail what has changed?

thunderbird configures the mail box after a few days mail box does not receive mails or send mails. when I checked the settings I find the default settings are changed. I am not able to reset manually. I have to delete the mail box and to configure again. same thing repeats after a few days.

Can you post your Troubleshooting Information before and after your settings have changed? Help (Alt-H) - Troubleshooting Information

i do not know what are the settings before trouble shoot. the mail box is configured by auto settings by Thunderbird. IMAP mail Post trouble settings(taken from the settings available now) incoming pop port 110 default 993 connection security ssl/tls out going smtp port 1 no authentication connection security ssl/tls

It would help if you would just post the Thunderbird troubleshooting info as requested and not just the points that you think are important.

Go to the Help Menu Select Troubleshooting Information Press the button labeled Copy all to Clipboard Come back here and paste that into a reply box.

What you have posted above does not look right for any provider that i have seen but since you have never posted who your provider is we are just guessing.

i do not know what are the settings before trouble shoot.

Let me rephrase this. Can you post your Troubleshooting Information while it's working and after you think your settings were changed automatically?

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 Thunderbird, check out our support website. Include account names (possibly identifying information) Application Basics Name Thunderbird Version 31.2.0 User Agent Mozilla/5.0 (Windows NT 6.3; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 Profile Folder C:\Users\Mohan\AppData\Roaming\Thunderbird\Profiles\hiz89yhn.default (Local drive) Application Build ID 20141012121702 Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Mail and News Accounts ID Name Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account2 Local Folders (none) Local Folders None Normal password account3 none (rss) Feeds None Normal password account4 nsm (imap) pop.bsnl.in:110 SSL/TLS Normal password smtp.bsnl.in:1 SSL/TLS Password, original method (insecure) true account5 [email protected] (pop3) pop.bsnl.in:110 None Encrypted password smtp.bsnl.in:1 SSL/TLS Password, original method (insecure) true Crash Reports Report ID Submitted

All Crash Reports Extensions Name Version Enabled ID Important Modified Preferences Name Value browser.cache.disk.capacity 358400 browser.cache.disk.smart_size.first_run false browser.cache.disk.smart_size.use_old_max false browser.cache.disk.smart_size_cached_value 358400 extensions.lastAppVersion 31.2.0 font.language.group x-unicode 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 font.size.variable.x-western 12 gfx.direct3d.last_used_feature_level_idx 0 mail.openMessageBehavior.version 1 mail.winsearch.firstRunDone true mailnews.database.global.datastore.id 5b9bfc71-7e4d-4374-b4ce-b02556f4de1 network.cookie.prefsMigrated true places.database.lastMaintenance 1416491375 places.history.expiration.transient_current_max_pages 104858 plugin.importedState true security.disable_button.openDeviceManager false Graphics Adapter Description Intel(R) HD Graphics Family Vendor ID 0x8086 Device ID 0x0a16 Adapter RAM Unknown Adapter Drivers igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32 Driver Version 10.18.10.3412 Driver Date 1-22-2014 Direct2D Enabled true DirectWrite Enabled true (6.3.9600.17111) ClearType Parameters ClearType parameters not found WebGL Renderer false GPU Accelerated Windows 1/1 Direct3D 10 AzureCanvasBackend direct2d AzureSkiaAccelerated 0 AzureFallbackCanvasBackend cairo AzureContentBackend direct2d 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 3.16.2.2 Basic ECC 3.16.2.2 Basic ECC NSS Util 3.16.2.2 3.16.2.2 NSS SSL 3.16.2.2 Basic ECC 3.16.2.2 Basic ECC NSS S/MIME 3.16.2.2 Basic ECC 3.16.2.2 Basic ECC

From the Troubleshooting Information you have two BSNL accounts. Which is the troubled one? Looking at your settings I'd really be surprised if anything works at all. Check with BSNL about the correct settings.

I have never seen a port 1 for an SMTP server. I do know that some antivirus software redo ports so they can scan email before sending. I wonder if that is what you are seeing?

I an with Chris is saying that there are so many inconsistencies in your settings it is no wonder it does not work. Port 110 usually does not use SSL/TLS One one account you have Nromal Password and on the other one you have No Password buy specify Encrypted.

Your first step, as Chris says, is to get an accurate listing of server settings from your provider so you know where to start. I did a Google search for settings for this provider and they are all over the place so I am not even going to link to any of them. Get a list straight from your provider.