Author Topic: Avast Business Antivirus - block e-mail from my server to gmail  (Read 474 times)

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Offline ALEXANDRU40

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For several days, sending emails to gmail (only gmail) has stopped working from our exchange server, the error message received "550 No SMTP server defined. Use real server address instead of 127.0.0.1 in your account." I mention that until few days ago it worked.
I tried to change the server settings, but without success, until I noticed that if I disable the antivirus, it works without problems. What anti-virus setting blocks my email? I tried to stop only the "mail shield", but it still doesn't work.

This product is installed on Windows Server 2008 R2 Standard with Exchange Server 2010.

Offline Asyn

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Offline mickey.b

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Re: Avast Business Antivirus - block e-mail from my server to gmail
« Reply #2 on: August 06, 2019, 08:23:47 PM »
For several days, sending emails to gmail (only gmail) has stopped working from our exchange server, the error message received "550 No SMTP server defined. Use real server address instead of 127.0.0.1 in your account." I mention that until few days ago it worked.
I tried to change the server settings, but without success, until I noticed that if I disable the antivirus, it works without problems. What anti-virus setting blocks my email? I tried to stop only the "mail shield", but it still doesn't work.

This product is installed on Windows Server 2008 R2 Standard with Exchange Server 2010.

We have been seeing a lot of these cases lately, and so far, what's been working for most of our customers have been updating their Exchange servers. You don't have to upgrade them to a newer version, but simply installing all of the latest/newest updates for your current version seems to resolve this issue.
- Mickey B.
Avast Business Senior Support Technician
https://www.avast.com/business/support

Offline Karonaway

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Re: Avast Business Antivirus - block e-mail from my server to gmail
« Reply #3 on: August 07, 2019, 11:45:50 PM »
You're incorrect about the updates.  I have two clients who run SBS 2011 which runs Exchange 2010.  The Exchange Server is up to date (for being a 2010 Exchange Server).   The clients are having the same problem and only Gmail is bouncing back with No SMTP Server defined.  I tried disabling parts of the Exchange Module, all of the Module, parts of Email module, all of the Email module.  I looked up the knowledge base and added IP under the exceptions in Trouble Shooting.  Nothing worked until I uninstalled AVAST all together which i am not happy about.  My subscription is coming due in 8 days and so i won't be renewing if i can't use it.

Offline Karonaway

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Re: Avast Business Antivirus - block e-mail from my server to gmail
« Reply #4 on: August 08, 2019, 08:46:32 PM »
If anyone is having this problem please reply to this thread so that AVAST will fix the problem.  This isn't a problem due to lack of updates

Offline mickey.b

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Re: Avast Business Antivirus - block e-mail from my server to gmail
« Reply #5 on: August 12, 2019, 05:48:40 PM »
You're incorrect about the updates.  I have two clients who run SBS 2011 which runs Exchange 2010.  The Exchange Server is up to date (for being a 2010 Exchange Server).   The clients are having the same problem and only Gmail is bouncing back with No SMTP Server defined.  I tried disabling parts of the Exchange Module, all of the Module, parts of Email module, all of the Email module.  I looked up the knowledge base and added IP under the exceptions in Trouble Shooting.  Nothing worked until I uninstalled AVAST all together which i am not happy about.  My subscription is coming due in 8 days and so i won't be renewing if i can't use it.

If updates didn't resolve the issue, you may need to create a case at Avast Business Support. Please provide information such as what Avast Business Antivirus product you have, and the email address your Avast Business Antivirus product is registered to, and if you are using the Cloud Management (web) Console at https://business.avast.com/ or the Business Management (on-premise) Console.

We also may request log files after you create the case. Please see How To Submit Avast Business Log Files for more information.
- Mickey B.
Avast Business Senior Support Technician
https://www.avast.com/business/support