The following FAQs are intended to answer questions about sending e-mail to a AT&T e-mail account that originates fron an ISP other than AT&T.

1. Are there any guidelines or standards for sending mail to AT&T customers?

AT&T guidelines and standards for e-mail can be found in our Acceptable Use Policy. AT&T requires that all e-mail comply with the U.S Can Spam Act. Failure to adhere to the AT&T E-mail standards will results in your message being blocked from entering the AT&T network.

2. What is the maximum message size that a AT&T customer can receive?

The maximum size of an e-mail message that a AT&T customer can receive is based on the individual customer's service type.

Maximum message size: Dial/DSL Lite = 10MB; DSL Ultra/Xtreme = 25MB

Note: Message size includes the combined total of the message text and any message headers and attachments; a binary attachment may occupy up to twice its original size once it is encoded for e-mail. Other factors, such as available mailbox space, may also impact receipt of a message into the customer's mailbox even if the message does not reach the maximum message size.

Click here for more information about maximum message size.

3. Can I request a customer's personal information from AT&T?

Releasing personal and confidential information is against AT&T's Privacy Policy. Please review our Legal Notices for detailed information on our Privacy Policy.

4. My e-mail doesn't appear to have been delivered, but I didn't get an error message.
    What should I do

There are various factors that may cause an e-mail not to be delivered. First, try to send the message to your own e-mail account. If this is unsuccessful, please consider the following:

• Confirm the e-mail address with your recipient. Check for correct spelling, and if there appears to be a space in the address, make sure that this “space” should not in fact be an underscore (_). Example: john_doe@bellsouth.net may appear as john_doe@bellsouth.net causing the underscore to look like a space.
• Try to resend the message. Temporary problems between mail servers can sometimes affect mail delivery.
• Your e-mail may be identified as SPAM and will be blocked from delivery if the recipient has their MailGuard set to “On”. If this is the case, ask the recipient to change their MailGuard settings to “Review” and try resending the message. If the AT&T customer already has the MailGuard set to "Review", ask the recipient to forward your e-mail to thisisgood @ att.net (without the spaces). This will ensure that your message gets delivered and not be identified as SPAM.
• If these suggestions do not resolve the problem, please contact your ISP for assistance. There may be a problem with the configuration of your mail client, or your ISP may be experiencing problems with their mail servers.

5. How do I keep my mail from going to the recipient's SPAM folder?

By adhering to AT&T's Acceptable Use Policy, your e-mail will most likely be delivered successfully to the customer's Inbox. If your e-mail meets the guidelines found in our Acceptable Use Policy but is still being filtered as SPAM, ask the AT&T customer to make sure their MailGuard is set to "Review" to allow SPAM messages to be delivered to a separate MailGuard folder for review. If MailGuard is set to Review and the problem persists, ask the recipient to forward the undeliverable e-mail message to thisisgood @ att.net (without the spaces). This will ensure that your message gets delivered and not be identified as SPAM.

6. I sent an e-mail to a AT&T customer but received an error message. What does this mean?

There are several reasons why an e-mail may not to be delivered. In each case, the sender will receive an error message that provides more information about why the message was not delivered. Please refer to our E-mail Error List to determine the cause of the error you are receiving.

7. What are the IP addresses for the AT&T mail servers used to send e-mail from att.net customer accounts?

A complete list of IP addresses for the AT&T Outbound Mail Servers can be found in the IP List for Outbound Mail Servers located on this site.

 

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