Gmail LS Negotiation failed

PDW

• April 10, 2020 09:48

I have been having issues with Gmail and sending mail as over the last few days. When sending email as (from my domain domain.org) I get a return email stating "TLS Negotiation failed, the certificate doesn't match the host. " Now I have been sending mail as through Gmail with multiple accounts for a very long time. So I go into accounts and import and any of my accounts adding, or updating passwords I get an error saying Server returned error: "TLS Negotiation failed, the certificate doesn't match the host., code: 0" So here is what I have tried as settings - I typically have used the domain name as the smtp host - domain.org or mail.domain.org I have also tried the host.com and get the same message. I have used both SSL and TSL ports 465 for SSL and 587 TLS. So with troubleshooting, I added these accounts to outlook (the app) and Bitdefender through up an error as well saying "OUTLOOK.EXE attempted to establish a connection relying on an unmatching security certificate to domain.org. We blocked the connection to keep your data safe since the used certificate was issued for a different web address than the targeted one" and I went ahead and added the exception and outlook did give me " The server you are connected to is using a security certificate that cannot be verified. The target principal name is incorrect. I believe that was using the domain name. Now in outlook if I use the hostname I get 0 error. But if I do that in Gmail I get error. Any thoughts? My data center is out of ideas as well.

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  paul.81property

  • April 20, 2020 16:41

  i have the same issue, i just use the ff: SMTP Server: Copy the shared server host name from the cPanel URL. Host name is between https:// and :2083/ so in this example case the correct host name would be n3plcpnl0082.prod.ams3.secureserver.net (don't use the mail.(domain).com) Port: 587 Username: user@domain.com Password: user password Secured connection using

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  gabrielmotta

  • April 22, 2020 20:59

  I had the same problem and last week I configured like WagnerCoelho33 has been mentioned and everything are working. The main domain your server must be https and you only put this domain into SMTP SERVER box in Gmail, select port 465, SSL, username, pass and save. The Gmail will send a email with confirm code.

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  bigworm50

  • June 12, 2020 22:55

  @jmvcolorado I also use assp The dev for the cpanel plugin said this [QUOTE] it's a known issue, it happens because gmail wants an immediate reply from server so if you have all ASSP workers temporarly busy gmail auth will refuse the request. Solution : increase number of ASSP workers 2 or 3 steps and try again Solution : this solution will work in any situation, set port 465 SSL as an EXIM only port using this how to

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  PDW

  • June 13, 2020 13:59

  I have been having no issues once I upgraded to ASSP V2 and set the certificate in ASSP to use the Cpanel SSL Cert and then also set SNI up for the domains. It was a very long and tedious process but it worked. Very frustrating for sure

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