Your best bet is talking to your email provider. The same goes for the recipients eventually. But it may be as simple as have them check their spam folder. In any case, once the message has been copied to the Sent folder it has been sent. So this isn't a Thunderbird problem.

christ1 said

Your best bet is talking to your email provider. The same goes for the recipients eventually. But it may be as simple as have them check their spam folder. In any case, once the message has been copied to the Sent folder it has been sent. So this isn't a Thunderbird problem.

I did talk with Time Warner who is our email provider. As you said they indicate that once it is in the sent box it is not their problem. I have also checked with the folks that were supposed to receive the email and there is NOTHING in their spam file. I then sent an email directly from Roadrunner web mail and it went through. I also have a gmail address using thunderbird and it went through. So what can I do?

I don't use Time Warner (I'm not in your country) but their website shows that, like most email service providers, there are limits to the number of emails you can send in a given period and, more importantly, to the number of recipients you can specify per email. Are you sure that you aren't exceeding those limits? The fact that your Gmail messages get through suggests that it's something to do with your TW account. In any case, as christ1 says, it's not a Thunderbird issue.

As you said they indicate that once it is in the sent box it is not their problem.

That isn't entirely correct. It means the message has been accepted from your provider's SMTP server from Thunderbird. What happens with your messages after that is what you need to ask them, and only they can answer that question. If the message got accepted by the recipients SMTP server, the problem is at the receiving end.

As said before, this is not a Thunderbird problem.

I am not a techie so I am not clear on some of the replies above. Again just certain email addresses are not getting through. While a few are blocked today others sent today do get through. So I do not understand the comment about a count of so many getting through.

Sorry I should have been clearer. If you send an email to (say) 50 recipients, and your provider only allows you to send to 40, then 10 will probably not get delivered. It might or might not be the same 10 each time. As I said, I don't use Time Warner and I don't know how their system handles things. I meant it as a helpful suggestion only, you will have to pursue this yourself.

Well that helps a little. I probably send 150 at a time usually in 3 bunches of 50 because TW limits me somewhere close to 100.

However these same few people are NOT receiving the email even if I am only sending this ONE person an email.

how email gets send.

Thunderbird dials up the outgoing mail server at your mail provider. It asks the server to deliver this mail to this address. is that all good. The server replies got it. All is good. Thunderbird takes down the sending dialog with the cancel button and copies the mail to your sent folder.

This is why your being told this is not a Thunderbird problem. If the server replied, nope all bad here is the error, you would be notified as soon and that sending dialog went away. with another pop up error dialog.

so the mail is being received by your mail provider. (TW). are the doing anything with it after they get it? only they can answer that question. Their server logs will show what they did with the mail. They might have decided it was spam and they were not sending it. but say they did send it on tosay and email address a comcast. The comcast server might accept the mail or it might not. Refusal used to result in a mail back telling you so, but these days most servers do not because of a vackscatter issue created by spammers. but again only TW will know if the recipint server accepted the mail when they tried to deliver it. then there are the issues at the other end. Did the person your mail actually give you their correct address, does your mail run foul of the providers spam filters, does it run foul of the users spam filters in their anti virus, or their commercial anti spam tools. The reasons for non delivery are myriad, more really that your can get with snail mail.

But think of Thunderbird as the envelope you write on and the mail box at the end of the street as to local mail server at TW. All we can tell you is you wrote an address on the envelope and it went into the mail box at the end of the street, we do not know if the mail truck ever emptied the box, if the truck got to the sorting centre or if the envelope was eaten by the sorting machine, let alone any of the other things that could prevent delivery of a snail mail.

I think that is a reasonable analogy.