Missing email attachment began happening recently with a sender I frequently exchange emails with.
For experimental purpose I let him send the same email with the same attachment(pdf file) to my address I normally use(earthlink) and to my gmail address. The one received at gmail came with the attachment but the one received at earthlink did not. I forwarded the mail received at gmail to my earthlink address and the attachment came with it. Note that I am using web mail and not using any mailer software.
What could be wring?