Thunderbird changes the address of the sender.

Please post all info: 1. In Thunderbird Help > TRoubleshooting Information click on 'copy text to clipboard' paste info into this question. You can edit/remove all info on fonts and printers but nothing else.

2. Are these two accounts pop mail accounts? If yes, do you use a Global Inbox eg: Local Folders Inbox?

3. Select an email which uses the wrong FROM email address when you click to Reply. click on 'other Actions' and select 'view source' What is written in the following locations:

• X-Account-Key: ? what account number ?
• To: ? I do not need to see the email address, but I need you to confirm whether it is the @interia.pl or the @onet.pl

1.

 Informacje o aplikacji
   Nazwa: Thunderbird
   Wersja: 31.7.0
   Identyfikator programu: Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
   Identyfikator kompilacji programu: 20150507114201
   Włączone wtyczki: about:plugins
   Konfiguracja kompilacji: about:buildconfig
   Zużycie pamięci: about:memory

 Konta poczty i grup dyskusyjnych
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext

   account2:
     INCOMING: account2, , (pop3) poczta.o2.pl:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: poczta.o2.pl:25, plain, passwordCleartext, true

   account4:
     INCOMING: account4, , (pop3) mail.maximail.pl:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: mail.maximail.pl:25, trySTARTTLS, passwordCleartext, true

   account5:
     INCOMING: account5, , (pop3) poczta.of.pl:110, trySTARTTLS, passwordCleartext
     OUTGOING: poczta.of.pl:25, plain, passwordCleartext, true

   account6:
     INCOMING: account6, , (pop3) 192.168.0.1:110, plain, passwordCleartext
     OUTGOING: 192.168.0.1:25, plain, passwordEncrypted, true

   account7:
     INCOMING: account7, , (pop3) xxxxxxx.nazwa.pl:995, SSL, passwordCleartext
     OUTGOING: xxxxxxx.nazwa.pl:465, SSL, passwordCleartext, true

   account8:
     INCOMING: account8, , (pop3) pop3.wp.pl:995, SSL, passwordCleartext
     OUTGOING: smtp.wp.pl:25, trySTARTTLS, passwordCleartext, true

   account9:
     INCOMING: account9, , (pop3) xxxxxxx.katowice.pl:110, trySTARTTLS, passwordCleartext
     OUTGOING: xxxxxxx.katowice.pl:465, SSL, passwordCleartext, true

   account10:
     INCOMING: account10, , (pop3) xxxxxxx.nazwa.pl:995, SSL, passwordCleartext
     OUTGOING: xxxxxxx.nazwa.pl:465, SSL, passwordCleartext, true

   account18:
     INCOMING: account18, , (pop3) mail.xxxxxxx.pl:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: mail.xxxxxxx.pl:587, alwaysSTARTTLS, passwordCleartext, true

   account19:
     INCOMING: account19, , (pop3) mail.xxxxxxx.info.pl:110, alwaysSTARTTLS, passwordCleartext
     OUTGOING: mail.xxxxxxx.info.pl:587, alwaysSTARTTLS, passwordCleartext, true

 Zgłoszenia awarii

 Rozszerzenia
   CompactHeader, 2.0.9, true, {58D4392A-842E-11DE-B51A-C7B855D89593}
   Extra Folder Columns, 1.1.5, true, extra-cols@jminta_gmail.com
   Lightning, 3.3.3, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   MinimizeToTray revived (MinTrayR), 1.1.2, true, mintrayr@tn123.ath.cx
   Search for Sender, 1.3.2, true, searchforsender@einaregilsson.com
   Signature Switch, 1.6.13, true, {2ab1b709-ba03-4361-abf9-c50b964ff75d}
   SmilieInserter Plus, 1.1.1, true, {5B54D47C-CDA4-11E0-9AD0-F5C74724019B}

 Ważne zmodyfikowane ustawienia

   Nazwa: Wartość

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 860160
     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
     extensions.lastAppVersion: 31.7.0
     font.internaluseonly.changed: false
     font.minimum-size.x-central-euro: 12
     mail.openMessageBehavior.version: 1
     mailnews.database.global.datastore.id: 8988c15b-e9f1-4ed4-9517-d93fba6f3b2
     network.cookie.lifetimePolicy: 2
     network.cookie.prefsMigrated: true
     places.database.lastMaintenance: 1333914896
     places.history.expiration.transient_current_max_pages: 93910
     places.history.expiration.transient_optimal_database_size: 139517624
     plugin.importedState: true
     plugin.state.java: 0
     plugins.update.notifyUser: true
     security.disable_button.openCertManager: false
     security.disable_button.openDeviceManager: false
     security.OCSP.disable_button.managecrl: false

 Grafika

     Opis adaptera: NVIDIA GeForce 9800 GTX+
     ID dostawcy: 0x10de
     ID urządzenia: 0x0613
     RAM adaptera: Unknown
     Sterowniki adaptera: nv4_disp
     Wersja sterownika: 6.14.13.4052
     Data sterownika: 7-2-2014
     Renderer WebGL: false
     Okna ze sprzętowym przyspieszeniem grafiki: 2/2 Direct3D 9

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

 JavaScript

 Przyrostowy GC: 1

 Ułatwienia dostępu

   Aktywne: 0
   Zablokuj ułatwienia dostępu: 0

 Wersje bibliotek

     Oczekiwana wersja minimalna
     Wersja w użyciu

     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

2. All accounts are POP. I use global inbox but the 2 accounts that I have the problem have: 1 has global inbox, 1 has separate inbox

3. I got the error every time on this email: X-Account-Key: account19 X-UIDL: 0000155753491f5a X-Mozilla-Status: 0001 X-Mozilla-Status2: 00000000 X-Mozilla-Keys: Return-path: <x1@aaaa.info.pl> Envelope-to: x2@aaaa.info.pl From: x1@aaaa.info.pl To: x2@aaaa.info.pl, x3@aaaa.info.pl

and I got it on my account: x2@aaaa.info.pl - account 19

When I click "Reply" it shows: TO: x1@aaaa.info.pl - that's OK Sender: kkkkk@go2.pl (account2 - that's the problem)

I got OK every time on this email - the same account19: X-Account-Key: account19 X-UIDL: 0000154453491f5a X-Mozilla-Status: 0011 X-Mozilla-Status2: 00000000 X-Mozilla-Keys: Return-path: <hhhhhhh.ggggggg@gmail.com> Envelope-to: x5@aaaa.info.pl To: <ggg@aaaa.info.pl> Cc: <my_email@aaaa.info.pl>

Fly By suggestion Go to Tools menu (alt+T) > account settings. Click the account name (above server settings. Is the outgoing server set correctly? I am guessing not.

The outgoing server is set correctly, on mail.xxxxxx.info.pl