Recently not been able to send emails from 2 addresses. I use 3 email addresses on my main desktop. When I try to send an email from 2 of these it seems to go and then is in the sent folder but never arrives at the destination address. I can send an email from the email server. The third email account works OK. Incoming emails are all OK. I also have another desktop. The emails from the address on that desktop work OK. Mail provider is btopenworld. ISP is TalkTalk Operating system is Win 10 Firewall/antivirus is built in from Win 10 Thunderbird version is 91.7.0 Hope someone can help!