Cannot find my bcc recipients in emails I've sent

[Randysea]

I sometimes send myself an email with 15 or so BCCs, like for announcing an event. I know it's working because I get replies. But I cannot retrieve a list of recipients of the BCCs in the Sent mail. I have tried looking at the message source and full headers. Still can't find the list.

The above was confirmed with an email I sent a few days ago. Just now, I tried the same with 3 BCC recipients. I can see them in the Sent mail. So, could this issue possibly be related to the number of BCC recipients? I have no way to test this myself. I don't want to bother my friends by sending them multiple test messages.


Thunderbird 60.6.1 (32 bit) in Windows 10 (64 bit)
Using POP & SMTP on my own domain.

[DanRaisch]

could this issue possibly be related to the number of BCC recipients?

If so it is not a Thunderbird limitation. http://kb.mozillazine.org/Limits_-_Thunderbird

[Randysea]

Oh, well. That was just a guess. Now I won't try to follow up on that idea.

Meanwhile, i still have no idea why my bcc recipients sometimes aren't showing up in emails in the Sent box.

[DanRaisch]

Who is the email provider?
Have you tried sending from the web mail page of that provider to see if that makes a difference?
How is the account set up in Thunderbird, as POP or IMAP? Find out using menu path Tools->Account Settings->Server Settings->Server Type at the top right of the dialogue.

Moving to Thunderbird Support.

[Randysea]

As noted in OP, Thunderbird 60.6.1 (32 bit) in Windows 10 (64 bit)
Using POP & SMTP on my own domain.

Email host provider is u2-web.com. Since the BCCs are being delivered, I can't see how it could be a provider issue.

I could start doing all my emails containing BCCs using only webmail, but that would be a royal pain. It's why I use Thunderbird in the first place.

[DanRaisch]

I could start doing all my emails containing BCCs using only webmail, but that would be a royal pain.

I wasn't suggesting that you do that. The point was to test and see whether the Sent folder on the server showed all BCC addresses for messages where Thunderbird does not.

[Randysea]

The point was to test and see whether the Sent folder on the server showed all BCC addresses for messages where Thunderbird does not.

Ok, now I understand your point. I just tried it. I sent to myself and three BCCs using webmail. All three BCCs showed up in the webmail Sent folder.

But that is the same as what happened earlier today when I did exactly the same thing in TB. My three BCCs showed correctly in TB's Sent folder. That's where I got the idea that maybe 15+ BCCs in TB work differently than 3 BCCs.

[DanRaisch]

Understood. I just tested with three BCC addresses and found no issues but, like you don't want to involve friends in the test to have more BCC addresses to send to. I have no additional suggestions for you other than to test the next message you have to send with a much larger number of BCC addresses.

[Randysea]

I just sent out a mailing with 40 addresses in BCC. They all showed as BCCs in my Sent folder. However, the addresses were all in a single List in my address book, plus one manual entry in addition.

I just put the list name in BCC and added the one manually. It is not exactly comparable to what I referred to in my OP. There I had individually entered 15+ addresses in BCC.

Someday when I have more time and an appropriate mailing, I may try again a long manual entry.

[MdniteEagl]

I actually have enough email addresses from various domains to send 15 BCCs all to myself. This was sent from a domain I own, IMAP, hosted by HostMonster.com. From and To were the same address, then I sent to 15 separate BCC addresses. Windows 10 Pro, TB 60.6.1 32-bit, computer was new last June with profile since that time. In the Sent folder of TB, the email opens showing all 15 BCC recipients individually as I expected. (It initially shows the first 5 of them with a link "10 more", which then presents all 15 when clicked.)