We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

为提升您的使用体验，本站正在维护，部分功能暂时无法使用。如果本站文章无法解决您的问题，您想要向社区提问的话，请到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 提问，我们的支持社区将会很快回复您的疑问。

Avatar for Username

搜索 | 用户支持

防范以用户支持为名的诈骗。我们绝对不会要求您拨打电话或发送短信，及提供任何个人信息。请使用“举报滥用”选项报告涉及违规的行为。

详细了解

话题已存档。 如果需要帮助请提出新问题。

Just recently Thunderbird messages sent are not being received

  • 2 个回答
  • 1 人有此问题
  • 4 次查看
  • 最后回复者为 Joe Jefferies

Joe Jefferies
Joe Jefferies
more options

We have a small office network (7 users) using Thunderbird (IMAP) and Gmail. It has worked virtually trouble free for several years but suddenly several users are finding that sent emails never arrive. These emails do go into sent box and sometimes there is a :-

'Cannot connect to IMAP server' message

GMail Webmail appears to wok perfectly on these accounts (though it doesn't get a great deal of use so I can.t be sure it is 100%)

I have tried deleting user password and the re-entering when prompted and also deleting an account and re-installing it. OS Win7 Thunderbird 52.8.0

Incoming Server imap.gmail.com Port 993 Security SSL Authentification OAuth2

Outgoing server smtp.gmail.com Port 465 Security SSL Authentification OAuth2

Extensions:- Lightning 5.4.8 Bullguard 18.0 (Outgoing email scan OFF)


I would be very grateful for any help on this problem

We have a small office network (7 users) using Thunderbird (IMAP) and Gmail. It has worked virtually trouble free for several years but suddenly several users are finding that sent emails never arrive. These emails do go into sent box and sometimes there is a :- 'Cannot connect to IMAP server' message GMail Webmail appears to wok perfectly on these accounts (though it doesn't get a great deal of use so I can.t be sure it is 100%) I have tried deleting user password and the re-entering when prompted and also deleting an account and re-installing it. OS Win7 Thunderbird 52.8.0 Incoming Server imap.gmail.com Port 993 Security SSL Authentification OAuth2 Outgoing server smtp.gmail.com Port 465 Security SSL Authentification OAuth2 Extensions:- Lightning 5.4.8 Bullguard 18.0 (Outgoing email scan OFF) I would be very grateful for any help on this problem

所有回复 (2)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
more options

Perhaps the problem is https://www.lifewire.com/what-is-the-simultaneous-gmail-imap-connection-limit-4023699 ?

Joe Jefferies
Joe Jefferies 提问者
more options

Wayne Thank you for your suggestion. I had considered this but I have tried shutting down all but one machine. I also use GMvault (for backup) but I ensured that this was disabled for my test. Sorry I should have mentioned this in my notes

Joe