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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: REDACTED on December 19, 2016, 03:51:13 PM

Title: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: REDACTED on December 19, 2016, 03:51:13 PM

Hi,

I have just realised that all of the emails I have sent the past week have not got to their intended recipients. They show in the sent folder of Thunderbird and I have had no error messages or mailerdaemon notifications. Luckily I had a client chase me up, which is how I realised there was an issue. After spending the morning troubleshooting it appears the problem is the outgoing mail scan within Avast (if i disable this Thunderbird works fine).   

I am using the free version of avast (11.2.2262) and latest version of Thunderbird on Windows 7.

I have disabled it for now, but would welcome a fix if possible.

Kind regards,

Roger

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: Eddy on December 19, 2016, 04:04:40 PM

Start with bringing avast up-to-date.
You are using a (very) old version.

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: Asyn on December 20, 2016, 06:00:00 AM

Update to the latest version (12.3.2280): https://forum.avast.com/index.php?topic=189836.0

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: REDACTED on December 20, 2016, 04:29:48 PM

Hi,

Thanks for the heads-up on the version (I thought that Avast updated automatically?).

Have updated, but the problem still persists?

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: Asyn on December 21, 2016, 05:43:15 AM

1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: REDACTED on December 23, 2016, 10:21:49 AM

Hi,

I have gone through the uninstall/install steps listed above and the same problem persists?

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: Asyn on December 23, 2016, 10:23:30 AM

No problems here, is your TB up to date..?

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: REDACTED on December 23, 2016, 10:47:54 AM

Yep, it's up to date (version 45.5.1)

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: Asyn on December 23, 2016, 10:56:28 AM

Strange, follow instructions: https://www.avast.com/faq.php?article=AVKB33#artTitle

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: john912 on December 29, 2016, 10:36:16 PM

I  had the same problem. My emails were being returned. This was after years of using avast and thunderbird and usinhg my current internet provider Vidahost. i thought it was because Vidahosts servers were blacklisted. Vidahost looked into it and came back with they thought it could be my anti virus. I switched Avast off and everything worked fine. Since then I have been into Avast and switched it back on but switched off the outgoing mail scanning (settings|components|mailshield|customise| and unticked scan outbound mail.) Everything worked. The reply that I got from my ISP explained it like this.
"Avast changes HELO to a value, that is a default one and is usually used by spammers, so whenever our system detects it, it routes the messages through specific IPs, which, due to the reasons above, often gets blacklisted." Not saying your problem is the same but maybe. Why it should suddenly start is an interestiing question. Maybe a change in thunderbird or avast started it.

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: vojtech on January 03, 2017, 09:49:43 AM

Thank you for the report. We will change the HELO/EHLO processing to not contain localhost address.

Title: Re: Avast 'Scan Outbound mail' setting blocking outgoing thunderbird mails
Post by: john912 on January 10, 2017, 02:12:06 PM

Thanks Vojtec
Can you let me know when it has been done and i will restore my old settings to allow outgoing email scanning.
John