doddie said

I have often emailed myself to test a new address etc. Someone emailed me yesterday and it did not arrive so I tried a self check (frm Mozilla) and it did not arrive either. I emailed myself using webmail and the message arrived in both the webmail and Mozilla inboxes! Any ideas on what has happened, please? Regards. doddie

Hello, Just tried again and email arrived!!! So mystery deepens! doddie

If your providers SMTP server accepted the sent mail from Thunderbird it is done. What happens after that is your providers operation. When the message did not arrive back to you was the message in your Inbox on the server when you checked? Thunderbird downloads messages from your Inbox on the server. If the message is not there, it cannot download it. Comparing mail sent thru SMTP servers and web mail means nothing. Complete different process through different servers. All it proves is that you know your username and password.

Thanks for your comments. The messages were not in the inbox on the server. Just tried sending again and received in a few seconds - so it must have been a temporary glitch, but disturbing to know that messages may not always reach their destination!!

Sent a message to myself to test message forwarding. My ISP is in Australia and the message forwarder which hosts my domain name is in USA. Tried several times but no response received. Has always worked before.

On both occasions called up Thunderbird Error Console which displayed the following warning logged at times consistent with the sending of the messages:

"mutating the prototype of an object will cause your code to run very slowly; instead create the object with the correct initial prototype value using Object.create. resource://gre/components/steel.Applications.js"

The same warning appeared each time, but the time changed to the latest sending, ie the latest warning apparently overwrites the previous one.

Now the message is well above my comprehension level, so what is it telling me in layman's language please, and what does it have to do with my messages with the same from and to addresses going out but not coming back?

Cheers, Murf_Oscar

PS In the warning message 'prototype' was in double squared braces; in the message the braces are deleted and 'prototype' is in red.