Hello there.

I have a Linux box for shared hosting and got a problem in sending emails.

I've been having a delivery problem whenever I send email to yahoo or hotmail account. There was no bounce back message and I think the messages are being queued, thus very much delayed. When I run /var/qmail/bin/qmail-qstat i receive this,

messages in queue: 4681
messages in queue but not yet preprocessed: 0

In the var/qmail/queue directory, there is a REMOTE directory containing 0 10 12 13 14 15 16 directories. Is this where spam emails are located? Can I just delete the contents of the REMOTE directory?

Could anyone please help me?

It's been asked and answered for Yahoo.
Summary: Send manually, see the diagnostic. Tell Yahoo your'e no spammer. They take your word for it.