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Cannot send to mailing list

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Since recent Thunderbird update 45.6.0 I cannot send to mailing list. When I select a mailing list Thunderbird is creating a single contact with the same name as the mailing list with an invalid email address. Getting this message

bbgolf <"Bunker Buddies"> 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.

The email address it creates is "Bunker Buddies"

Since recent Thunderbird update 45.6.0 I cannot send to mailing list. When I select a mailing list Thunderbird is creating a single contact with the same name as the mailing list with an invalid email address. Getting this message bbgolf <"Bunker Buddies"> 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. The email address it creates is "Bunker Buddies"

Chosen solution

Please check to see if there now a contact with bbgolf <"Bunker Buddies"> in one of your Address books, like the Collected Addresses. If there is, delete it and try again.

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Chosen Solution

Please check to see if there now a contact with bbgolf <"Bunker Buddies"> in one of your Address books, like the Collected Addresses. If there is, delete it and try again.