I've just tested this on my system. Test one: Copy pasted two email addresses from a column in an excel sheet. One was above the other - no blank rows.

Pasted as two email addresses separated by a comma. Sent and received ok, so the commas did not cause an issue.

Test two: Created a blank line/row in excel sheet between the two email addresses, then copy pasted the two plus the blank line. In TO field this was shown as: email address followed by two commas then last email address. When sent this caused the second email address to become invalid. After fist comma, it added double quotes followd by a comma (where the blank line was positioned) then added another double quote just before the @ in the second email address. this made the second email address invalid. So it is definately not working with blank lines.

First email received ok, second email returned a Mail Delivery Service Delivery Status Notification - Recipient address rejected: User unknown in virtual mailbox table.

However, if you imported the .csv file as an address book, you could use it within Thunderbird. If wanting to send one email to several people, then create Mailing Lists. This does not fix your scenario, but it will resolve the issue of sending one email to a group of valid email addresses. Info on Mailing lists.

• https://support.mozilla.org/en-US/kb/how-create-and-use-mailing-lists

re: graying of the header section when not active

Please see recent question asked:

• https://support.mozilla.org/en-US/questions/1038671

Performed a furhter test.

Test three: Copy pasted the two email addresses including the blank line. then hit 'Tab' or 'Enter' key this auto corrected the blank line. Now shows first email address in first TO field. Put second email address in another TO field, it should have removed both commas, but it only removed one , so that the second email address starts with a comma. This also caused a fail. This sounds like your scenario.

I have created a bug report:

• https://bugzilla.mozilla.org/show_bug.cgi?id=1116497

Please could you offer some info in this bug report. I'm using Windows Vista, so if you see this in another OS please let them know. You can 'Vote' for this bug - see top section were it says: Importance: there is a (Vote) link. To post bug reports, add comments and vote for a bug, you would need to register and logon.

Hi Toad - thanks for the note. I saw that you were able to recreate it -- your first reply talking about importing addresses .csv etc. is all fine but the way I have used TB for years is as follows. I run several mailing lists etc. for example

I go to excel and I copy let's say a 100 rows (1 column) that contain either

~~~~~~~~~~~~~~~~~~~~~~ a@gmail.com a@gmail.com, b@gmail.com a@gmail.com, <BLANK cell anywhere> ~~~~~~~~~~~~~~~~~~~~~~ THEN I go to TB - put curser in BCC field (change TO to BCC) - and hit paste.

It pastes it as one line. THEN I press RETURN and it separates it to multiple BCC lines.

This has always worked. The new version chokes at this AT THE BLANK LINE AT THE COMMA ETC.....

Thanks for reporting it b/c it's a very important bug.

Toad-Hall said

I've just tested this on my system. Test one: Copy pasted two email addresses from a column in an excel sheet. One was above the other - no blank rows. Pasted as two email addresses separated by a comma. Sent and received ok, so the commas did not cause an issue. Test two: Created a blank line/row in excel sheet between the two email addresses, then copy pasted the two plus the blank line. In TO field this was shown as: email address followed by two commas then last email address. When sent this caused the second email address to become invalid. After fist comma, it added double quotes followd by a comma (where the blank line was positioned) then added another double quote just before the @ in the second email address. this made the second email address invalid. So it is definately not working with blank lines. First email received ok, second email returned a Mail Delivery Service Delivery Status Notification - Recipient address rejected: User unknown in virtual mailbox table. However, if you imported the .csv file as an address book, you could use it within Thunderbird. If wanting to send one email to several people, then create Mailing Lists. This does not fix your scenario, but it will resolve the issue of sending one email to a group of valid email addresses. Info on Mailing lists.

• https://support.mozilla.org/en-US/kb/how-create-and-use-mailing-lists

THANKS -- JUST POSTED THIS AS RESPONSE TO YOUR EARLIER MSG

Hi Toad - thanks for the note. I saw that you were able to recreate it -- your first reply talking about importing addresses .csv etc. is all fine but the way I have used TB for years is as follows. I run several mailing lists etc. for example

I go to excel and I copy let's say a 100 rows (1 column) that contain either

~~~~~~~~~~~~~~~~~~~~~~ a@gmail.com a@gmail.com, b@gmail.com a@gmail.com, <BLANK cell anywhere> ~~~~~~~~~~~~~~~~~~~~~~ THEN I go to TB - put curser in BCC field (change TO to BCC) - and hit paste.

It pastes it as one line. THEN I press RETURN and it separates it to multiple BCC lines.

This has always worked. The new version chokes at this AT THE BLANK LINE AT THE COMMA ETC.....

Thanks for reporting it b/c it's a very important bug.

Toad-Hall said

Performed a furhter test. Test three: Copy pasted the two email addresses including the blank line. then hit 'Tab' or 'Enter' key this auto corrected the blank line. Now shows first email address in first TO field. Put second email address in another TO field, it should have removed both commas, but it only removed one , so that the second email address starts with a comma. This also caused a fail. This sounds like your scenario. I have created a bug report:

• https://bugzilla.mozilla.org/show_bug.cgi?id=1116497

Please could you offer some info in this bug report. I'm using Windows Vista, so if you see this in another OS please let them know. You can 'Vote' for this bug - see top section were it says: Importance: there is a (Vote) link. To post bug reports, add comments and vote for a bug, you would need to register and logon.

There is nothing wrong with the method you have been using, but it is not the quickest method and under the current situation with the commas issue, it would mean you having to manually check a lot of email addresses. Hence why I suggested it as an alternative.

If you have all the email addresses as contacts in an address book in thunderbird, you can then create what is known as a 'Mailing List'. then when you want to send an email to everyone in the Mailing list :

• 1st click: open a Write message or Template email,
• 2nd click: select the address book,
• 3rd click: select the list name and
• 4th click: click on 'Addto Bcc',
• 5th click: click on Send button

Just five simple clicks to do the entire job if using a template prewritten email. Otherwise you would need to type content as well. How quick is that?  :)

'Toad

Thank you Toad, yes, I'm aware of it however, my list regularly changes so it's easier to just paste it in (it's very quick ;-)

I had contact with the programmers and today I got this mail. Do you know what it means?

Do not reply to this email. You can add comments to this bug at https://bugzilla.mozilla.org/show_bug.cgi?id=1116497

Magnus Melin <mkmelin+mozilla@iki.fi> changed:

          What    |Removed                     |Added

                CC|                            |mkmelin+mozilla@iki.fi
          Keywords|                            |regression
           Summary|Commas in email address     |pasting addresses with
                  |cause invalid email address |blank line results in
                  |                            |double commas ",," between
                  |                            |addresses - says invalid
                  |                            |address

Thanks