OUTLOOK - Invalid Domain

[mightysoft]

HI,
I have been sending to 6 of my friends for over a year via outlook group
mail, but it now keeps being returned saying:
"The following message to <TuesdayGang> was undeliverable.The reason for the
problem:5.1.1 - Bad destination email address 'invalid domain "": no dot
found'
I can send to them individually but not as a group like I used to, can you
please help.
MS

 

[Brian Tillman [MVP - Outlook]]

I have been sending to 6 of my friends for over a year via outlook group
mail,

Please tell us what the term "outlook group mail" means because Outlook
doesn't use that term.

but it now keeps being returned saying:
"The following message to <TuesdayGang> was undeliverable.The reason for the
problem:5.1.1 - Bad destination email address 'invalid domain "": no dot
found'

If you mean this is happening when you send a mesage to a Distribution List,
then one of the addresses in the DL is wrong. Just fix it.