Why wont e-mail work on the iPhone for my company?

Question

Ok i have been wanting to get an iPhone for a while now. About 8 months ago a bunch of us in our company upgraded our phones and most of us got new blackberry's because thats what we always had. One person decided to get an iPhone. When i tried to set up the e-mail for them it just didnt work well at all. Some e-mail came in, most didnt. An e-mail would go out, but most wouldnt. There was no rhyme or reason for it. We were missing tons of e-mails and in our industry i cant afford to miss e-mails and have them not come through, or not being able to reply to them. We dont use AOL, or Gmail, or any of those, but our e-mail is not on an exchange server. It is POP3. I was thinking that maybe the e-mail has gotten better and maybe it will work now? Well at least im hoping... Any ideas?

Answer 1

Although a POP account can be accessed with more than one email client, a POP account is designed to be accessed with a single email client only. If the account is being accessed with an email client on the one person's computer and the email client on the one person's computer is launched and running actively checking the incoming mail server for new messages while the iPhone's Mail client is doing the same, only one email client can be checking the incoming mail server for new messages and/or downloading new messages at a time.
In addition, what is the account setting with the email client used on the computer for accessing the account for removing messages from the server when downloaded? If set to remove messages from the server when downloaded and the email client is actively checking the account for new messages and downloading new messages received at the server while the iPhone's Mail client is doing the same, the messages downloaded with the email client on the computer will be removed from the server when downloaded so the messages will not be available for the iPhone's Mail client to download when the iPhone's Mail client checks the incoming mail server for new messages afterwards.
Does the account have an authenticated SMTP server?
If not, there will be problems sending messages with the account depending on the the internet service provider being used for the internet connection at the time.