Why am I having problems sending mail from my IMAP mail client?

Typically, problems sending messages indicate that your outbound (SMTP) server is configured incorrectly. If this is the case, you may receive messages similar to the following:

"The recipient dvader [or whoever is in the "To:" field] is not acceptable to your SMTP server. The message is unsendable until the recipient has been changed."

"550 <dvader@empire.gov> Relaying Denied."

To correct the problem, at any Indiana University campus except IPFW (which uses the POP protocol and its own SMTP servers), in the configuration of your mail software, set the outbound (SMTP) server to:

Note: IU's outbound (SMTP) server requires authentication and a secure connection (SSL or TLS). Make sure you enable these settings in your mail software. For more information, see Instructions for changing mail settings to meet UITS requirements.

Note: If you connect to Indiana University computing systems through most outside Internet service providers (ISPs), for your IMAP software's outbound server setting you can use either mail-relay.iu.edu or your ISP's outgoing server setting; either one should work. However, if you are required to use your ISP's SMTP server, substitute that server's name for mail-relay.iu.edu. Also, check with your ISP to determine whether its SMTP server requires authentication, and SSL or TLS.

Also see:

• When I try to connect to IU through an outside ISP, why do my IMAP mail messages bounce?
• What are the requirements for using Eudora for Mac OS X to read my IU mail?
• At IU, if I use an outside ISP, what should I know about my outgoing mail server?
• At IU, what SMTP (outgoing mail) server should I specify when configuring my IMAP mail software?
• At IUB or IUPUI, what information will I need to configure my Internet software?