Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

The mail server responded: 5.7.0 Must issue a STARTTLS

  • 7 replies
  • 8 have this problem
  • 115 views
  • Last reply by DrKarl

more options

I've checked that server settings are STARTTLS and updated TB to the latest version, also restarted the computer. I still get the same message An error occurred while sending mail. The mail server responded: 5.7.0 Must issue a STARTTLS command first. Please verify that your email address is correct in your account settings and try again.

I've checked that server settings are STARTTLS and updated TB to the latest version, also restarted the computer. I still get the same message An error occurred while sending mail. The mail server responded: 5.7.0 Must issue a STARTTLS command first. Please verify that your email address is correct in your account settings and try again.

Chosen solution

You're showing us the Write window. Try again in the main Thunderbird window.

Maybe you checked the incoming (POP/IMAP) settings and not the outgoing (SMTP) settings?

Read this answer in context 👍 1

All Replies (7)

more options

Please post your Troubleshooting Information. Help (Alt-H) - Troubleshooting Information

more options

Perhaps I am blind, I cannot find the trouble shooting information.

more options

Chosen Solution

You're showing us the Write window. Try again in the main Thunderbird window.

Maybe you checked the incoming (POP/IMAP) settings and not the outgoing (SMTP) settings?

Modified by Zenos

more options

Perhaps I am blind, I cannot find the trouble shooting information.

more options

Ah, much better thanks Zenos


 Application Basics
   Name: Thunderbird
   Version: 38.3.0
   User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0
   Profile Folder: Show Folder
             (Local drive)
   Application Build ID: 20150928051427
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
 Mail and News Accounts
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext
   account2:
     INCOMING: account2, , (pop3) mail.nzcylinders.com:110, alwaysSTARTTLS, passwordEncrypted
     OUTGOING: mail.engineservices.co.nz:587, plain, passwordEncrypted, true
   account3:
     INCOMING: account3, , (pop3) mail.engineservices.co.nz:110, alwaysSTARTTLS, passwordEncrypted
     OUTGOING: mail.engineservices.co.nz:587, plain, passwordEncrypted, true
   account4:
     INCOMING: account4, , (pop3) mail.engineservices.co.nz:110, alwaysSTARTTLS, passwordEncrypted
     OUTGOING: mail.engineservices.co.nz:587, plain, passwordEncrypted, true
   account5:
     INCOMING: account5, , (imap) mail.nzcylinders.com:143, alwaysSTARTTLS, passwordCleartext
     OUTGOING: mail.nzcylinders.com:587, alwaysSTARTTLS, passwordEncrypted, true
 Crash Reports
   http://crash-stats.mozilla.com/report/index/bp-880fb510-5960-4098-9a67-f37922150920 (20/09/2015)
   http://crash-stats.mozilla.com/report/index/bp-370152a7-dc94-4ae5-a095-a304c2150914 (15/09/2015)
   http://crash-stats.mozilla.com/report/index/bp-c0640118-2528-4795-b080-e69fe2150901 (2/09/2015)
   http://crash-stats.mozilla.com/report/index/bp-f644bda1-5820-406c-b925-bdf2c2150901 (2/09/2015)
 Extensions
   Lightning, 4.0.3, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   Mail Merge, 4.1.0, true, mailmerge@example.net
   Thunderclient Extension, 1.0, true, thunderclient@sample.com
   ImportExportTools, 3.2.4.1, false, {3ed8cc52-86fc-4613-9026-c1ef969da4c3}
   Quicktext, 0.9.11.6, false, {8845E3B3-E8FB-40E2-95E9-EC40294818C4}
   Silvermel and Charamel XT, 1.6.1, false, silvermelxt@pardal.de
   Thunderbird Conversations, 2.10, false, gconversation@xulforum.org
 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
     dom.max_script_run_time: 60
     extensions.lastAppVersion: 38.3.0
     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.sans-serif.x-western: 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: 17
     gfx.blacklist.suggested-driver-version: 6.1400.1000.5218
     gfx.direct3d.last_used_feature_level_idx: 0
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: a94ea86e-4a01-4988-96f4-e977dd64305
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     mailnews.database.global.views.global.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1443666868
     places.history.expiration.transient_current_max_pages: 104858
     places.history.expiration.transient_optimal_database_size: 85481552
     plugin.importedState: true
     print.print_printer: \\DG-SERVER\Brother HL-2140 series
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_bgcolor: false
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_bgimages: false
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_command:
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_downloadfonts: false
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_edge_bottom: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_edge_left: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_edge_right: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_edge_top: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_evenpages: true
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_footercenter:
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_footerleft: &PT
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_footerright: &D
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_headercenter:
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_headerleft: &T
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_headerright: &U
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_in_color: true
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_margin_bottom: 0.5
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_margin_left: 0.5
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_margin_right: 0.5
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_margin_top: 0.5
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_oddpages: true
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_orientation: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_pagedelay: 500
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_data: 9
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_height: 11.00
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_size: 2622392
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_size_type: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_size_unit: 1
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_paper_width: 8.50
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_reversed: false
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_scaling: 1.00
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_shrink_to_fit: true
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_to_file: false
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_unwriteable_margin_bottom: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_unwriteable_margin_left: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_unwriteable_margin_right: 0
     print.printer_\\DG-SERVER\Brother_HL-2140_series.print_unwriteable_margin_top: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_bgcolor: false
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_bgimages: false
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_colorspace:
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_command:
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_downloadfonts: false
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_duplex: 100
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_edge_bottom: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_edge_left: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_edge_right: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_edge_top: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_evenpages: true
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_footercenter:
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_footerleft: &PT
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_footerright: &D
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_headercenter:
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_headerleft: &T
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_headerright: &U
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_in_color: true
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_margin_bottom: 0.5
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_margin_left: 0.5
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_margin_right: 0.5
     print.printer_\\DG-
more options

Too many characters, here's the last part of the report. SERVER\HP_LaserJet_Professional_P1102.print_margin_top: 0.5

     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_oddpages: true
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_orientation: 0
     print.printer_\\DG-SERVER\HP_LaserJet_Professional_P1102.print_page
more options

Zenos, you are correct Maybe you checked the incoming (POP/IMAP) settings and not the outgoing (SMTP) settings? Problem solved, thank you