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Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp-mail.outlook.com timed out. Try again.

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  • 1 has this problem
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  • Last reply by Sergio

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HI, I suddenly can't send emails ?! Did not change anything. I still receive email fine. Password and smtp setting works with other devices but not on my desktop anymore.

Any hints ?

  Name: Thunderbird
  Version: 78.11.0
  Build ID: 20210528153351
  Distribution ID:
  User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0
  OS: Linux 5.4.0-80-generic
Mail and News Accounts
  account1:
    INCOMING: account1, , (imap) outlook.office365.com:993, SSL, passwordCleartext
    OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true
  account4:
    INCOMING: account4, , (imap) outlook.office365.com:993, SSL, passwordCleartext
    OUTGOING: , smtp.office365.com:587, alwaysSTARTTLS, passwordCleartext, true

Modified by Sergio

Chosen solution

Info about my system and email configuration. Both email account stopped working. Both SMTP where set on smtp-mail.outlook.com:587 I changed one to test with no avail.

   Name: Thunderbird
   Version: 78.11.0
   Build ID: 20210528153351
   Distribution ID:
   User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0
   OS: Linux 5.4.0-80-generic
 Mail and News Accounts
   account1:
     INCOMING: account1, , (imap) outlook.office365.com:993, SSL, passwordCleartext
     OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true
   account4:
     INCOMING: account4, , (imap) outlook.office365.com:993, SSL, passwordCleartext
     OUTGOING: , smtp.office365.com:587, alwaysSTARTTLS, passwordCleartext, true
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Chosen Solution

Info about my system and email configuration. Both email account stopped working. Both SMTP where set on smtp-mail.outlook.com:587 I changed one to test with no avail.

   Name: Thunderbird
   Version: 78.11.0
   Build ID: 20210528153351
   Distribution ID:
   User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0
   OS: Linux 5.4.0-80-generic
 Mail and News Accounts
   account1:
     INCOMING: account1, , (imap) outlook.office365.com:993, SSL, passwordCleartext
     OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true
   account4:
     INCOMING: account4, , (imap) outlook.office365.com:993, SSL, passwordCleartext
     OUTGOING: , smtp.office365.com:587, alwaysSTARTTLS, passwordCleartext, true

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