1. A method comprising the computer-implemented steps of:
receiving, from a sender, an electronic mail message that is directed to a recipient and comprises one or more hyperlinks;
modifying, at an e-mail server, the one or more hyperlinks by appending an identifier value after each of the one or more hyperlinks, wherein the identifier value comprises information about the sender of the electronic mail message;
receiving, from the recipient, a request to access a specified hyperlink among the one or more hyperlinks;
determining, based on the identifier value that is appended after the specified hyperlink and the information about the sender, a particular action among a plurality of allowed actions; and
issuing a network request to access the specified hyperlink only when the particular action is allowing the recipient to access to the specified hyperlink.
2. A method as recited in claim 1, wherein the plurality of allowed actions include blocking the recipient to access to the specified hyperlink.
3. A method as recited in claim 1, wherein the identifier value is removed from the specified hyperlink before issuing the network request.
4. A method as recited in claim 1, wherein the request to access the specified hyperlink is received at an HTTP proxy, and wherein the electronic mail message is received at an SMTP mail transfer agent that is coupled to the HTTP proxy.
5. A method as recited in claim 1, wherein the identifier value comprises a network address of a sender of the electronic mail message.
6. A method as recited in claim 1, wherein the identifier value comprises a message digest of the electronic mail message.
7. A method as recited in claim 1, wherein the identifier value comprises a message identifier that a sending mail transfer agent assigns to the electronic mail message.
8. A method of controlling access to server resources, comprising the computer-implemented steps of:
receiving, from a sender, an electronic mail message that comprises one or more hyperlinks;
generating an identifier value, comprising information about the sender, for each of the one or more hyperlinks, wherein the identifier value comprises any one of: a network address of a sender of the electronic mail message; a message digest of the electronic mail message; and a message identifier that a sending mail transfer agent assigns to the electronic mail message;
modifying, at an e-mail server, the one or more hyperlinks by appending respective identifier values after each of the one or more hyperlinks;
receiving, from the recipient, a request to access a specified hyperlink among the one or more hyperlinks;
determining, based on the identifier value that is appended after the specified hyperlink and the information about the sender, a particular action among a plurality of allowed actions, wherein the plurality of allowed actions include blocking the recipient to access to the specified hyperlink; and
removing the identifier value from the specified hyperlink and issuing a network request to access the specified hyperlink only when the particular action is allowing the recipient to access to the specified hyperlink.
9. A method as recited in claim 8, wherein the request to access the specified hyperlink is received at an HTTP proxy, and wherein the electronic mail message is received at an SMTP mail transfer agent that is coupled to the HTTP proxy.
10. A data processing apparatus, comprising in combination:
one or more processors; an HTTP proxy server hosted on one or more of the one or more processors;
an SMTP mail transfer agent that is coupled to the HTTP proxy server;
electronic mail processing logic coupled to the HTTP proxy server and to the SMTP mail transfer agent, wherein the electronic mail processing logic comprises one or more sequences of instructions which, when executed by the one or more processors, cause the one or more processors to perform the steps of: receiving, from a sender, an electronic mail message that is directed to a recipient and comprises one or more hyperlinks;
modifying the one or more hyperlinks by appending an identifier value after each of the one or more hyperlinks, wherein the identifier value comprises information about the sender of the electronic mail message; receiving, from the recipient, a request to access a specified hyperlink among the one or more hyperlinks; determining, based on the identifier value that is appended after the specified hyperlink and the information about the sender, a particular action among a plurality of allowed actions; and
issuing a network request to access the specified hyperlink only when the particular action is allowing the recipient to access to the specified hyperlink.
11. An apparatus as recited in claim 10, wherein the plurality of allowed actions include blocking user access to the specified hyperlink.
12. An apparatus as recited in claim 10, wherein the identifier value is removed from the specified hyperlink before issuing the network request.
13. An apparatus as recited in claim 10, wherein the identifier value comprises a network address of a sender of the electronic mail message.
14. An apparatus as recited in claim 10, wherein the identifier value comprises a message digest of the electronic mail message.
15. An apparatus as recited in claim 10, wherein the identifier value comprises a message identifier that a sending mail transfer agent assigns to the electronic mail message.
16. A data processing apparatus, comprising in combination:
one or more processors;
an HTTP proxy server hosted on one or more of the one or more processors;
an SMTP mail transfer agent that is coupled to the HTTP proxy server;
electronic mail processing logic coupled to the HTTP proxy server and to the SMTP mail transfer agent, wherein the electronic mail processing logic comprises:
means for receiving from a sender, an electronic mail message that is directed to a recipient and comprises one or more hyperlinks;
means for modifying the one or more hyperlinks by appending an identifier value after each of the one or more hyperlinks, wherein the identifier value comprises information about the sender of the electronic mail message;
means for receiving, from the recipient, a request to access a specified hyperlink among the one or more hyperlinks;
means for determining, based on the identifier value that is appended after the specified hyperlink and the information about the sender, a particular action among a plurality of allowed actions;
means for receiving a network request to access the specified hyperlink only when the particular action is allowing the recipient to access to the specified hyperlink.
17. An apparatus as recited in claim 16, wherein the plurality of allowed actions include blocking the recipient to access to the specified hyperlink.
18. An apparatus as recited in claim 16, wherein the identifier value is removed from the specified hyperlink before issuing the network request.
19. An apparatus as recited in claim 16, wherein the identifier value comprises a network address of a sender of the electronic mail message.
20. An apparatus as recited in claim 16, wherein the identifier value comprises a message digest of the electronic mail message.
21. An apparatus as recited in claim 16, wherein the identifier value comprises a message identifier that a sending mail transfer agent assigns to the electronic mail message.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A fixing device comprising:
a heated fixing member;
a pressing member to form a nip portion between the pressing member and the fixing member, wherein the fixing member and the pressing member fix a toner image on a recording medium;
a first blowing unit that separates the recording medium from the fixing member by blowing air to a position close to a leading edge of the recording medium having passed the nip portion; and
a second blowing unit that separates the recording medium by blowing air to the recording medium whose leading edge has passed through the nip portion,
wherein a discharge pressure of the air discharged by the first blowing unit is larger than a discharge pressure of the air discharged by the second blowing unit;
a discharged air volume discharged by the first blowing unit is less than a discharge air volume discharged by the second blowing unit; and
a first discharge port from which air is blown by the first blowing unit is arranged upstream of a second discharge port from which air is blown by the second blowing unit in a direction of conveyance of the recording medium;
wherein the first blowing unit discharges air compressed by an air compressor and the second blowing unit discharges air ventilated by a fan.
2. The fixing device of claim 1, wherein a blowing position of the fixing member, to which the air from the first blowing unit is blown to, is a position to which the leading edge of the recording medium reaches along an outer surface of the fixing member within 20 msec from an exit of the nip portion.
3. The fixing device of claim 2, wherein the first blowing unit is adapted to blow air from the first blowing unit to the blowing position within an area of an angle made by a tangent to the fixing member at the blowing position and an extension line from the nip portion.
4. The fixing device of claim 1, wherein a plurality of the first discharge ports and a plurality of the second discharge ports are arranged in the across the width direction of the recording medium to be fixed; and the fixing device is provided with a control unit wherein, when fixing the recording medium narrower than the widest recording medium that can be fixed, control is provided in such a way as to suspend a blowing of air from the first and second discharge ports which are located at an end in the across width direction of the recording medium and which do not contribute to separation of the recording medium.
5. The fixing device of claim 4, further comprising a plurality of electromagnetic valves communicating with the first discharge ports respectively, and a plurality of fan switches communicating with the second discharge ports, wherein the control unit controls on-off operations of the electromagnetic valves and fan switches.
6. An image forming apparatus comprising:
an image forming section for forming a toner image;
a transfer section for transferring the toner image onto a recording medium; and
a fixing device for fixing the toner image on the recording medium,
wherein the fixing device includes:
a heated fixing member;
a pressing member to form a nip portion between the pressing member and the fixing member, wherein the fixing member and the pressing member fix a toner image on a recording medium;
a first blowing unit that separates the recording medium from the fixing member by blowing air to a position close to a leading edge of the recording medium having passed the nip portion; and
a second blowing unit that separates the recording medium by blowing air to the recording medium whose leading edge has passed through the nip portion,
wherein a discharge pressure of the air discharged by the first blowing unit is larger than a discharge pressure of the air discharged by the second blowing unit;
a discharged air volume discharged by the first blowing unit is less than a discharge air volume discharged by the second blowing unit; and
a first discharge port from which air is blown by the first blowing unit is arranged upstream of a second discharge port from which air is blown by the second blowing unit in a direction of conveyance of the recording medium;
wherein the first blowing unit discharges air compressed by an air compressor and the second blowing unit discharges air ventilated by a fan.
7. The image forming apparatus of claim 6, wherein a blowing position of the fixing member, to which the air from the first blowing unit is blown to, is a position to which the leading edge of the recording medium reaches along an outer surface of the fixing member within 20 msec from an exit of the nip portion.
8. The image forming apparatus of claim 7, wherein the first blowing unit is adapted to blow air from the first blowing unit to the blowing position within an area of an angle made by a tangent to the fixing member at the blowing position and an extension line from the nip portion.
9. The image forming apparatus of claim 6, wherein a plurality of the first discharge ports and a plurality of the second discharge ports are arranged in the across the width direction of the recording medium to be fixed; and the fixing device is provided with a control unit wherein, when fixing the recording medium narrower than the widest recording medium that can be fixed, control is provided in such a way as to suspend a blowing of air from the first and second discharge ports which are located at an end in the across width direction of the recording medium and which do not contribute to separation of the recording medium.
10. The image forming apparatus of claim 9, wherein the fixing device further comprising a plurality of electromagnetic valves communicating with the first discharge ports respectively, and a plurality of fan switches communicating with the second discharge ports, wherein the control unit controls on-off operations of the electromagnetic valves and fan switches.