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This article applies to Microsoft® Hosted Exchange customers who have not yet been migrated to Microsoft® Office 365. If you are currently using Office 365, please visit Microsoft’s Set up Office 365 for business support page.
Comcast helps to ensure the security and performance of its network with certain limits on Comcast Business email. Find out what you need to know about these restrictions.
Violating any of these limitations will result in an error message and the failure of your email attempt.
100 recipients per email.
1,000 outbound emails per hour. One email sent to 100 recipients is counted as 100 outbound emails. If you send 10 emails, each of which are going to 100 recipients, you will reach the 1,000 emails-per-hour limit. If this occurs, your account will be blocked from sending email for 45 mintues.
20 MB per email. If the total size of your email, including attachements and headers, exceeds 20 MB you will be unable to sucessfully send that message.
In an effort to protect our customers, Comcast will temporarily suspend a customer’s ability to send email if the customer generates abnormally high outbound email traffic or a significant amount of email appears to be spam.
In this case, a customer’s email may be suspended for up to one hour per occurrence. To prevent re-occurrences, you should check the content of messages, including any URLs in the signature file, the number of undeliverable recipients and volume of mail being sent.
If you believe your account has been flagged or have further questions about our email policies, please contact Customer Security Assurance at 1-888-565-4329.
To view your mailbox size or see how much storage space you have available, follow these steps within Microsoft® Outlook 2010:
Note: Once all migrations are complete, mailbox size will be 25 GB.
From the File tab, select Mailbox Cleanup from the Cleanup Tools dropdown.
Select View Mailbox Size.
Select the ServerData tab to view the total size of your email box.
In the Navigation pane, click Mail.
Hover your mouse point over your name at the top of the Mail folder list.
The current size of your mailbox and your mailbox size limit will be listed.
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Configure Microsoft® Outlook to connect to your email allowing you to synchronize emails, calendars, contacts and tasks.
Create or delete an email account with these simple step-by-step instructions.
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