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email rejected on VPN
I am using ExpressVPN on my MacBook Pro, running macos 10.13.6 High Sierra. My email client Thunderbird 68.7.0 is no longer able to reliably send email while my VPN is running. Thunderbird puts my ou...
>> The SMTP settings are unchanged - smtp.telus.net, port 587, no connection security.
That is the entire problem in itself. You can only connect to smtp.telus.net without any connection security from a Telus IP. If you're using a VPN, you need to use the secure smtp settings to send. I've had no issues with Thunderbird on MacOS with the correct settings in it.
Server: smtp.telus.net
Port: 1025
Security: STARTTLS <<< Important. If SSL/TLS is selected, you will get a connection error.
FuzzyLogic
Community Power User
Community Power UserThe settings should be the same regardless of the device/client you are using. Confirm the ports, SSL settings and server names.
I'm using IMAP for receiving, and its working fine, so those settings are good - imap.telus.net, SSL/TLS, normal password.
The SMTP settings are unchanged - smtp.telus.net, port 587, no connection security.
Thunderbird says the server is rejecting a connection. That implies the VPN is passing through the connection attempted by Thunderbird.
- Nighthawk
>> The SMTP settings are unchanged - smtp.telus.net, port 587, no connection security.
That is the entire problem in itself. You can only connect to smtp.telus.net without any connection security from a Telus IP. If you're using a VPN, you need to use the secure smtp settings to send. I've had no issues with Thunderbird on MacOS with the correct settings in it.
Server: smtp.telus.net
Port: 1025
Security: STARTTLS <<< Important. If SSL/TLS is selected, you will get a connection error.
Problem has returned. I thought it was resolved on the 28th... I have not changed my configuration in the interim.
To recap, I am using Thunderbird on macos High Sierra, with ExpressVPN running. Thunderbird smtp config'd port 1025, connection security STARTTLS. When I send a msg, I receive this Alert msg from Thunderbird
"An error occurred while sending mail: The mail server sent an incorrect greeting: mtlp000087 cmsmtp Connection Rejected - see http://www.spamhaus.org//query/ip/(address assigned by ExpressVPN)"
The message is not sent.
If I disconnect from the VPN server, a test msg is accepted by Telus' server and received at destination. When I reconnect to the VPN, I get the error msg.
- Nighthawk
Some people have used VPNs to send spam. Sometimes their VPN servers / IP addresses get blacklisted.
