I can still send to lists with version 31.1.0. I think there are some changes in how quotes are handled. Can you please try to send to the listname without quotes and see if that helps? If so, you probably have to edit your address book and remove the quotes there. if it doesn't help, try to restart in safe-mode to see if an extension is causing the problems...

I am also having this problem. Group lists worked fine until version 31.1.0. Now I get an error saying "<"list name"> is not a valid e-mail address because it is not in the form user@host. You must correct it before sending the e-mail.

More users are experiencing this problem. See Master List <"Master List"> is not a valid e-mail address because it is not of the form user@host. for more info...

Noted that lots of others are having this problem. the nightmare forecast seems to be coming true

In response to Onno requests: 1. There are no quotes in the properties of the list (specifically the name, eg list name) in the address book: when the list is inserted into the To: panel of the mail, T'bird itself inserts the list name between brackets and quotes eg <"list name">. Removing the quotes - why they are there isn't explained - would make the list name the same as individual addresses, except that does does not change the nature of the error report ie address not in form of xxx@yyy.zzz

2. the "see master list link ...." in the last response fails. I get a page not available error. So either a correct link or alternative explanation would be appreciated.

General comments. It would help enormously if responses could include a link tho these responses directly. Searching for them can be painful.

On the other hand, in this instance having to search to find my original post, I came across a number of users directly panning (stop screwing around with this was one comment I noted) the developers for meddling in this area of TB functionality for this version. The support specialists should expeditiously send this one back to the developers and get them to put out a patch release "Tout de Suite" to fix it, if not sooner.

Davidk03

I am directing all similar requests (bookmarks here) to this one and marking them as a bug via the "Abuse" link.

Found this via Onno's link above, which made it work for me:

"Although list expansion normally do work, I now see the case it apparently caught was that lists where the list description is set to a multi word description -> the description is quoted -> the list expansion fails."

It takes more than removing the spaces!

The List Name, "Stiefvater - WI-Lornz (A-L exc Stiefvater)", has been used for years without a problem. Now I get the following error message:

Invalid Recipient Address "Stiefvater - WI-Lornz (A-L exc Stiefvater)" <"Stiefvater - WI-Lornz (A-L exc Stiefvater)"> is not a valid e-mail address because it is not of the form user@host. You must correct it before sending the e-mail.

What does this error message mean? Lists are never in the form user@host.

I removed some spaces and replaced others with underlines so that no spaces remained. But the resulting List Name failed too: Stiefvater-WI-Lornz_(A-L_exc_Stiefvater). So I removed hyphens and underlines and ended up with the List Name StiefvaterWILornz(ALexcStiefvater), but it failed too. After the parentheses were taken out, the List Name StiefvaterWILornzALexcStiefvater worked.

Is this a bug that is going to be fixed? Henceforth can only letters be used in List Names? No spaces, no characters, and maybe even no numbers (I didn't test a List Name containing numbers). If this problem isn't fixed, I'll have to edit List Names for 90 more lists.

I just wanted to add to the bunch. I can not send to a group list anymore either. The group is: Misawa <"Air Force Buddies">. I have removed the quotes and the spaces and it did not help.