This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

Can't send email. Receive fine.

  • 3 ردود
  • 1 has this problem
  • 41 views
  • آخر ردّ كتبه Grizz952

Grizz952
Grizz952
more options

Seemingly suddenly I cannot send email using Thunderbird. There have been no recent configurational changes. There are several computers in the home. I can log onto these and send email. The issue appears to be localized to my desktop. I can send/receive email from my desktop using Gmail directly, but when using Thunderbird sending (SMTP server) times out.

Mail provider: Gmail ISP: Google Fiber Firewall version: Windows defender AV software/version: AVG (free) 19.1.3075 (31Jan2019) Op sys: Windows 10 TBird ver: 10.5.0

Description: Google Mail Server Name: smtp.gmail.com port: 465 Authorization Method: Normal Password Connection Security: SSL/TLS

Seemingly suddenly I cannot send email using Thunderbird. There have been no recent configurational changes. There are several computers in the home. I can log onto these and send email. The issue appears to be localized to my desktop. I can send/receive email from my desktop using Gmail directly, but when using Thunderbird sending (SMTP server) times out. Mail provider: Gmail ISP: Google Fiber Firewall version: Windows defender AV software/version: AVG (free) 19.1.3075 (31Jan2019) Op sys: Windows 10 TBird ver: 10.5.0 Description: Google Mail Server Name: smtp.gmail.com port: 465 Authorization Method: Normal Password Connection Security: SSL/TLS

الحل المُختار

Solved. Changed smtp (Connection Security) parameter from 'SSL/TLS' to 'StartTLS', and all appears to be well. For all the pain and suffering searching for resolution, this was infuriatingly simple. The VPN support staff was super in helping troubleshoot.

Read this answer in context 👍 0

All Replies (3)

Grizz952
Grizz952 صاحب السؤال
more options

Follow-up... I have cascading routers configured. Primary (ISP provided) router and secondary (VPN) router. Thunderbird is able to send email when logged into the primary router. However, unable to send email when logged into the secondary router. Could my VPN be disrupting communication to SMTP?

sfhowes
sfhowes
  • Top 10 Contributor
more options

VPNs are known to cause sending errors, unless the VPN provider has given explicit instructions for configuring email clients. You may have to ask the VPN provider to whitelist the gmail smtp server.

Grizz952
Grizz952 صاحب السؤال
more options

الحل المُختار

Solved. Changed smtp (Connection Security) parameter from 'SSL/TLS' to 'StartTLS', and all appears to be well. For all the pain and suffering searching for resolution, this was infuriatingly simple. The VPN support staff was super in helping troubleshoot.