Email stays in Outbox longer than usual

When one of the users sends out email from MS Outlook it does not instanlty send it but stays in Outbox folder for a minute or two and then goes out.
Can it be because capacity of mailbox is 2.5 GB (I know it is big but it is impotant) or mailnox size does not matter in this case?

Thank you.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Size is unlikely to have an impact on the send speed.

More likely that the parameter is not set to send emails as soon as they are 'sent., or that it is taking time to connect to a pop3 account.

Check tools > options > mail setup
Is 'send immediately when connected' ticked?
bqamarauliAuthor Commented:
"Send immediately when connected option" is set. That's not an issue.

I thought may be I ping Exchange server and see how is connection performing. May be it takes time to connect to the Exchange server. There is not big delay, may be a minute to be honest but it is still irritating.
Have you a AV clinet on the machine that is canning the email before sendin?
bqamarauliAuthor Commented:
I do but the thing is all computers have the same AV but non of them are experiencing the same problem.
That doesn't mean the AV client on that particular client isn't wigging out. Try disabling the AV software and check for things like spyware.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Servers

From novice to tech pro — start learning today.