my virgin email wont send on outlook app for android when connected to wifi all ok on 4g

Try to read the error message in Outlook when you try to send via wi-fi.

I had this issue and the error message highlighted that VM had blocked my IP address. They fixed it quickly after I used the following route to get hold of the VM Security team. 

• go to https://netreport.virginmedia.com/netreport/ :
• select Email Sending Errors from drop down list
• Other from drop down list
• copy and paste the error message into  Log evidence field
• enter your name into My name field
• enter email address into Email address field
• select Submit button

Hi kls1

Thank you for your post and welcome to our community. 

We are aware of an issue that may be causing problems sending and receiving email.

We are working on this and will have this fixed as soon as possible.

We do apologise for any inconvenience that may be caused in the meantime.