E-Mail Spooling Service - Why am I receiving duplicate e-mails?
Why am I receiving duplicate e-mails?
This is usually caused by the SMTP session being terminated before our servers receive confirmation that the e-mail message has been delivered successfully. There is a know bug (ID CSCds90792) in some versions of the Cisco PIX firewall that can cause this. If you have a CCO login you view this bug using Cisco's Bug Toolkit (http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCds90792). To correct this issue Cisco recommends either updating the PIX firewall firmware or disabling the mailguard feature using the 'no fixup protocol smtp 25' command.
We Answer Your Questions: FAQ
Q: What is the maximum e-mail attachment size?
A: The ETRN.com e-mail servers do not limit the size of individual e-mail attachments. The ETRN.com e-mail servers do impose a 400 MB maximum total message size limit. Individual customers can choose a smaller message size limit. We can also customize the handling of "over-sized" e-mails. Please contact us to discuss your specific needs. A couple of important facts:
1. Attachments are typically encoded in what is called Base64[1]. As a result, the actual length of MIME-compliant Base64-encoded binary data is usually about 137% of the original file size.
2. E-mails often contain both plain text and HTML components. This also increases the overall size of the e-mail.