Re: Yahoo and "Filename contains lots of white space" rule
Mark Sapiro <[email protected]>
| Newsgroups | gmane.mail.virus.mailscanner |
|---|---|
| Message-ID | <[email protected]> |
On 1/19/21 1:58 PM, Ricky Boone wrote: > Hello everyone, > > I was seeing a disproportionate number of messages from legitimate > @yahoo.com <http://yahoo.com> senders hitting our environment that, when > they have an attachment with a long name with spaces, they hit the > "Filename contains lots of white space" rule in filename.rules.conf. > Upon deeper inspection, it appears it may be something with Yahoo and > how they handle spaces when generating the Content-Disposition header in > the message. In most cases, when the file name went past a certain > number of characters, it was wrapped to the next line, but with 5-10 > blank characters padded to it. See <https://www.rfc-editor.org/rfc/rfc5322.html#section-2.2.3> Note that the filename= parameter in a Content-Disposition is a structured field and should not be folded - try telling Yahoo that. Are you saying that Yahoo is folding by inserting more than just a CRLF, i.e. a CRLF and a TAB or multiple spaces. In that case, Yahoo is again non-conformant. However, none of that is helpful to you. There may be a MailScanner issue if Yahoo is folding by inserting CRLF TAB and MailScanner is considering the TAB to be multiple spaces. Is that the case? -- Mark Sapiro <[email protected]> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan -- MailScanner mailing list [email protected] http://lists.mailscanner.info/mailman/listinfo/mailscanner