The mail server that received the message. Both the mail server that sent the message, and the mail server that received the message. Also, this behavior can occur if the time is not set correctly, or is set correctly but an incorrect time zone has been selected. RFC 822 defines Internet standards for recording time zone information and defines ten alphabetic time zone labels. Time zone offsets West of Greenwich are expressed as negative numbers and time zone offsets East of Greenwich are expressed as positive numbers.
Local time is calculated by the receiving server from the message header of the sending mail server.
All other time zone offsets are expected to be numeric only, so that the time adjustment for the local time zone is correct. The Microsoft Exchange client is able to properly calculate the time from all ten time zones listed in the RFC 822, provided they follow the standard for this time zone in the SMTP header. All others must be listed in numeric form. Servers supporting the RFC 822 environment need to be configured to use numeric GMT offsets for the correct date and time stamping of messages from around the world. All rights reserved.