Gmail SMTP Incorrect Greeting 10060
I've been using Thunderbird to download my gmail for years, without any problems. I'm currently on 38.4.0. In the past few days, when trying to send mail, I started getting: An error occurred while sending mail: The mail server sent an incorrect greeting: Cannot connect to SMTP server 2607:f8b0:400d:c08::6c (2607:f8b0:400d:c08::6c:587), connect error 10060.
I didn't change any settings, so I'm wondering if gmail or Thunderbird changed (did it update itself?). I have my settings in Thunderbird set to smtp.gmail.com port 587 STARTTLS Authn: Normal password User Name: [email protected]
Thanks in advance for any help.
Chosen solution
Server settings look good. Is there a personal firewall or a proxy which might prevent Thunderbird from connecting to the server?
Note, when logging in using OAuth2 the first time you're prompted for your Gmail password in a browser like window. This is your real Gmail password, not any application specific password. After that you're prompted to allow Thunderbird to access Gmail.
Read this answer in context 👍 0All Replies (6)
I have my settings in Thunderbird set to smtp.gmail.com port 587 STARTTLS Authn: Normal password
Change your settings for the OUtgoing Server/SMTP as per below: server name: smtp.gmail.com port: 465 connection security SSL/TLS authentication method: OAuth2
For the incoming server change 'authentication method' to 'OAuth2' as well.
I tried that and got the below when trying to send an email through Thunderbird: Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.gmail.com timed out. Try again.
I don't see any choice for Oauth2 for the incoming (POP) server settings for the gmail server.
Please post your Troubleshooting Information.
At the top right of the Thunderbird window, click the menu button 
, then select Help > Troubleshooting Information.
Press the Copy text to clipboard button and paste the information into your reply.
I don't see any choice for Oauth2 for the incoming (POP) server
You're quite right, OAuth2 is for IMAP only. Sorry about the confusion.
Application Basics
Name: Thunderbird
Version: 38.4.0
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0
Profile Folder: Show Folder
(Local drive)
Application Build ID: 20151119061742
Enabled Plugins: about:plugins
Build Configuration: about:buildconfig
Memory Use: about:memory
Mail and News Accounts
account1:
INCOMING: account1, , (none) Local Folders, plain, passwordCleartext
account3:
INCOMING: account3, , (pop3) mail.lonex.com:143, SSL, passwordCleartext
OUTGOING: smtp.gmail.com:465, SSL, OAuth2, true
account4:
INCOMING: account4, , (pop3) pop.gmail.com:995, SSL, passwordCleartext
OUTGOING: smtp.gmail.com:465, SSL, OAuth2, true
Crash Reports
Extensions
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Chosen Solution
Server settings look good. Is there a personal firewall or a proxy which might prevent Thunderbird from connecting to the server?
Note, when logging in using OAuth2 the first time you're prompted for your Gmail password in a browser like window. This is your real Gmail password, not any application specific password. After that you're prompted to allow Thunderbird to access Gmail.
That was it. I forgot that when I was away, I had to set my Avast firewall to public. I thought it would have switched itself back to private when it saw that I was home and reconnected to my private home network, but I guess not. Putting it back at private solved the problem. Thanks! Now if I can figure out my POP issue in the other thread I'll be back to normal