e-mail list at contacts

[wetabax]

Hi, I hope someone have the answer.

Before, if I send an email to the name of an e-mail list (e.g. friends3)
and write in to: field friends3, thunderbird understands that's an email
list and change this address with all emails into this list.

What is happening now: I have an email list with this data:
List name 3Solar
List alias 3so...@myname.com.br

adresses do insert in the e-mail
adre...@something.com.br
adre...@something.com.br

(like it always was)

Now, when I send this email I get this message:

There was an error by sending your message. The e-mail server returns:
5.1.3 The recipient address <3Solar> is not a valid RFC-5321 address.
Please check the recipient from the message "3Solar" and try again.

What must I do?

Thank you
regards
w

[John Weiss]

On 03/16/21 12:50, wetabax wrote:
>
> Hi, I hope someone have the answer.
>
> Before, if I send an email to the name of an e-mail list (e.g. friends3)
> and write in to: field friends3, thunderbird understands that's an email
> list and change this address with all emails into this list.
>

> There was an error by sending your message. The e-mail server returns:
> 5.1.3 The recipient address <3Solar> is not a valid RFC-5321 address.
> Please check the recipient from the message "3Solar" and try again.
>
> What must I do?

Try hitting the Tab key instead of the Enter key to enter the list
address. This step is necessary now when using MailMerge, so it might
also work with lists.

[WaltS48]

Tried changing 3Solar to Solar3?

--
OS: Fedora 33 Workstation - Gnome Desktop
https://www.thunderbird.net/en-US/get-involved/

[Dave Royal]

I've seen this reported twice, both times caused by the sigswitch addon.
<http://forums.mozillazine.org/viewtopic.php?f=39&t=3071471>
But I'm sceptical that it's the only or prime cause.

--
(Remove numerics from email address)

[Steve]

Does it work if you delete the alias or nickname?