Temporarily disabling AVG Internet Security Free

Hello J G,
Thank you for contacting AVG Community Support.
We understand that you are unable to send email and have to disable AVG to send it.
We are really sorry to know this. We'll certainly check and help you out.
Please follow the below instructions & check if the issue persists:
Open AVG Internet Security > Click on Menu > Settings > Basic Protection > Email Shield > Untick/disable the "Scan outbound emails (SMTP)" checkbox.
Once you've performed the above actions, please restart your computer once & check for the issue.
Keep us updated.

Hello J G,
Thank you for contacting AVG Community Support.
We understand that you are unable to send email and have to disable AVG to send it.
We are really sorry to know this. We'll certainly check and help you out.
Please follow the below instructions & check if the issue persists:
Open AVG Internet Security > Click on Menu > Settings > Basic Protection > Email Shield > Untick/disable the "Scan outbound emails (SMTP)" checkbox.
Once you've performed the above actions, please restart your computer once & check for the issue.
Keep us updated.

Hello 
Yesterday, I was unable to send e_mails with .pdf PCs, .jpeg, as they were displayed in error with a red exclamation mark. 
According to my research on the Internet, you should disable AVG Internet Security, which I just purchased! Dangerous, but I was planning to do it momentarily to send urgent emails with PJ.

Can you give me any info and/or links ?

Thank you in advance.
Kind regards.
J G P