blueyonder addressees can no longer receive from my google account on eM Client

Up until last week I was able to send to blueyonder email addressees from my gmail address on eM Client.  Now I get the delay message and then permanently undeliverable  It says that there are too may simultaneous services.  I can send from my tablet and phone without a problem

Hello Jackie,
are these messages from the blueyonder server? Are there any errors in eM Client?
Could you perhaps screenshot one of the message delay/undeliverable warnings here?

Regards,
Olivia

Thank you.  Some emails are getting through now, but it is ‘hit and miss’ and some are several days late.  This is the warning message (below).  It may turn into an undeliverable message later.  

This is an automatically generated Delivery Status Notification 
THIS IS A WARNING MESSAGE ONLY.
 
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
 
Delivery to the following recipient has been delayed:
 
     pstdn@blueyonder.co.uk
 
Message will be retried for 1 more day(s)
 
Technical details of temporary failure:
The recipient server did not accept our requests to connect. Learn more at https://support.google.com/mail/answer/7720
[mx.mnd.ukmail.iss.as9143.net. 212.54.58.11: 421 mx2.mnd.ukmail.iss.as9143.net bizsmtp Too many simultaneous sessions
]
[mx.tb.ukmail.iss.as9143.net. 212.54.56.11: 421 mx1.tb.ukmail.iss.as9143.net bizsmtp Too many simultaneous sessions
]
 
----- Original message -----
 
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=from:to:subject:date:message-id:in-reply-to:reply-to:user-agent
         :mime-version;
        bh=3v4DFkPpZ5RfDc/B2NFLlujBQ5tR2l7zDZAqTLO0HRk=;
        b=vrdM4uUAnnEQfgNf3YxjNOZy9bpbl/nOxUrm+XJlJXRJqbObAIEoIskFffmhDpQOwi
         32hwxJe6CWPCP649a/L2yk8nV0fEor0jH7OvA2oO4ibFRLSOyZ1uCLf3OC8lsrKbai0t
         GxFm7j90J8oJVNWFEx/cFmHY2fGAQh8LhWlph1aYC+oZGQtGwF2tRICjXqXLNdj8H/bM
         0Ut8apmIWagPTQZTtIdxHdo9tYxQ2nLuV5sksHgulCVuC7o/yxRpdUuXBCLl1AIK9LXU
         1EuEin3jTaeSKORFJel6DGN7azuW104ky2qoQslWaXQx+MVzvc5JtXfGzLVEEmyTll+R
         lkJQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20130820;
        h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to
         :reply-to:user-agent:mime-version;
        bh=3v4DFkPpZ5RfDc/B2NFLlujBQ5tR2l7zDZAqTLO0HRk=;
        b=SrSO2x8ivgrngHLPILzph/IZ1dIeqDrJkylOWK3j7xvTGHv8TL/R9jq0BcZTjvdTQz
         S+hqzPDpLzCVkKM/VfPMgcFEEI/qgshZcYwZX7DU8SPBDK7CPCkNRRo7ioWgA88wYVyV
         e/9ffyRG9JVA/3sblZdaDuSQmqkrzO15eMLxbQySE1+DaQ/Hk2CFKTjk7U9McjdMV4PH
         kLSEUoHuTvT/onlEpxW0N5JuMd8nDgVdaJFweZZKeBF06L1kcxq9n1syXWRvvOL20Km1
         vZU9QK9A41HYcqxzPDyb1eVUAoRRgkJFfR9vm8wkYIwV57uOtIsxgKNiNnUe+MHH/KTG
         qCUg==
X-Gm-Message-State: AD7BkJIANC00lW5JWKJs5VlPR2YoP4ZhYb/DPkbS+3XgfuJ5DHhN99PSELvEvlwVDiP6uA==
X-Received: by 10.194.115.8 with SMTP id jk8mr147633wjb.142.1459607389464;
        Sat, 02 Apr 2016 07:29:49 -0700 (PDT)
Return-Path: <jac.long67@gmail.com>
Received: from [192.168.0.2] (cpc87211-aztw31-2-0-cust222.18-1.cable.virginm.net. [82.46.60.223])
        by smtp.gmail.com with ESMTPSA id js8sm19080225wjc.37.2016.04.02.07.29.48
        for <pstdn@blueyonder.co.uk>
        (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
        Sat, 02 Apr 2016 07:29:48 -0700 (PDT)
From: “jackie long” <jac.long67@gmail.com>
To: “Peter Nash” <pstdn@blueyonder.co.uk>
Subject: Re[2]: ROTA MEETING
Date: Sat, 02 Apr 2016 14:28:42 +0000
Message-Id:
In-Reply-To: <000001d18ce2$fab49050$f01db0f0$@blueyonder.co.uk>
Reply-To: “jackie long” <jac.long67@gmail.com>
User-Agent: eM_Client/6.0.24928.0
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="------=_MB8FBB5D76-4A17-4680-B48C-5CA5B8C9E8DB"

I don’t think you would be needed at a rota meeting so no problem!

the following is what I get when it turns to a failure message:

Delivery to the following recipient failed permanently:
 
     roger.long67@virginmedia.com
 
Technical details of permanent failure:
The recipient server did not accept our requests to connect. Learn more at https://support.google.com/mail/answer/7720
[mx.tb.ukmail.iss.as9143.net. 212.54.56.11: 421 mx8.tb.ukmail.iss.as9143.net bizsmtp Too many simultaneous sessions
]
[mx.mnd.ukmail.iss.as9143.net. 212.54.58.11: 421 mx1.mnd.ukmail.iss.as9143.net bizsmtp Too many simultaneous sessions
]
 
----- Original message -----
 
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=from:to:subject:date:message-id:reply-to:user-agent:mime-version;
        bh=216or8Q5HCvMVpwTt5pt3PglZ0UzKt83ZlcuM1Q5ck0=;
        b=Kx8MX57ksw6ZgDRgbmhdvgQlOFqo3JqydYDyq0tc8m+V2uoZQzF2SKzUzdrAglD4q0
         ELKlShBXsdwZAQTeuIEQbIzX9S/VB6vApgdOd5AKnAf2z0wFQh4/156/SAxWdzczuZsO
         FWnvpTjVGyeHvY9ewvpKJH8HLp+0JpnUaakv0vpJxyMWJrASvtImDCuTqUOrBGoUWV1G
         9/BfIqlzUUV3CKZWvKNDsB+kOsyr/bHkkgn28Oln8TjBJm19v6/UlnHbdCxQazJtxImK
         2cRZvz3gIUVX83usiruW2AZ2g4X1g0AYMMnLzagMF/Ovs7asTdu585g8FNdc8B8FtNxS
         nTzg==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20130820;
        h=x-gm-message-state:from:to:subject:date:message-id:reply-to
         :user-agent:mime-version;
        bh=216or8Q5HCvMVpwTt5pt3PglZ0UzKt83ZlcuM1Q5ck0=;
        b=BANz15HYQLzx1Vnc+2RPdYlDcUFgO6WzzUUz3giekBi1akEEhQBmizoeYR2rTnAJ12
         A7iGzQr9VHAPpXhPQKCfebkDptIk3Xvm1ONWEuGRpJ4gu6uZNyoFVvhOC9sa2gVIy5rg
         u+3D9hMcf0qcmlLV8QlyFwTUev7BtzRRBbhe1axxpBEjR/hsagsp+bfZn5LR5pTsJBkM
         9ZZYpbLZHeO0afM+z8bnMXTjmEGUCzR4X4Ty7XUeMa0h8vjs8cW2c5rCKK3XtWFytPR7
         thQ9G/1B8O2fl97ZpGvq32BbDo3Afh9FBfG9MGDHUH2C8/QyvSfRcd1ZHFsfs0gVC7j/
         iDrQ==
X-Gm-Message-State: AD7BkJJRlxDUL0W2tOnJ8v2Kp1u4mwFVLPalsWN5XBSerLKsxa0nMmshFBcmny3FfrCELg==
X-Received: by 10.194.120.99 with SMTP id lb3mr12365445wjb.59.1459360151797;
        Wed, 30 Mar 2016 10:49:11 -0700 (PDT)
Return-Path: <jac.long67@gmail.com>
Received: from [192.168.0.2] (cpc87211-aztw31-2-0-cust222.18-1.cable.virginm.net. [82.46.60.223])
        by smtp.gmail.com with ESMTPSA id t7sm5024458wjf.39.2016.03.30.10.49.10
        for <roger.long67@virginmedia.com>
        (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
        Wed, 30 Mar 2016 10:49:11 -0700 (PDT)
From: “jackie long” <jac.long67@gmail.com>
To: “roger long” <roger.long67@virginmedia.com>
Subject: prescotts
Date: Wed, 30 Mar 2016 17:48:40 +0000
Message-Id:
Reply-To: “jackie long” <jac.long67@gmail.com>
User-Agent: eM_Client/6.0.24928.0
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="------=_MBE1751368-38A9-4DED-9DB8-933CA6ECECC0"

Wed 6th at 3.30

xx


*******************************************
Dr Jackie Long, Emersons Green,Bristol, UK

Hello Jackie,
even though you experience this problem with eM Client, there is unfortunately nothing we can do.
This message is generated as a reply from the recipient’s server to your gmail server.
The gmail support article that is in the reply mentions few things that could be wrong with the recipient’s server - https://support.google.com/mail/answe…
But the issue could also be that you are logged in to too many active devices with your gmail account and gmail tries to synchronize with all of them and creates more sessions with the recipient’s server.

Some useful support post explaining this problem can also be found here:
Too many simultaneous connections - https://support.google.com/mail/answe…

Regards,
Olivia

thanks for trying - frustrating!