> its been a while how do I set up the synonym file
From the help. I took out the Netware stuff.
Address Synonyms
Many sites need to use custom address formats where the user's e-mail address is quite different from his actual user name on the system. For example, you may want your addresses to have the form Firstname.Lastname@host.domain. Simple aliasing won't allow you to do this kind of addressing easily - it will handle incoming mail well enough, but in order to get mail going out from your system to use the alternative address forms requires the co-operation of your mail client.
Pegasus Mail and Mercury/32 can combine to support alternative address forms like this (referred to as synonyms) using a special database called a synonym database: Mercury needs this database so it can work out the recipient for incoming mail, while Pegasus Mail needs it to work out what address it should write into outgoing messages. Using synonyms differs slightly depending on whether or not you are running in Novell NetWare mode:
* If either Pegasus Mail or Mercury is running in non-NetWare mode,
then you will need to follow these steps:
1: Create a synonym source file: this is a text file where each line has the form
synonym == username
So, on the left-hand side you place the user's e-mail address as you want it to appear in outgoing mail, and on the right hand side his or her local user name. Note that each line must begin hard against the left-hand margin.
2: Compile the source file using the FSYNONYM commandline program. FSYNONYM takes your input file and creates a synonym database file.
3: Copy the synonym database somewhere accessible by Mercury, and make sure the Synonym database file entry of the Files/Directories preferences page of the Mercury core module configuration dialog refers to that file.
4: Copy the synonym database file into the same directory as your copy of the Pegasus Mail executable file (either WINPMAIL.EXE or WINPM-32.EXE), making sure it is called SYNONYM.MER.
5: [Only required once] Use the Pegasus Mail option on the Mercury configuration menu to configure your copy of Pegasus Mail. This operation is only required if you have upgraded your copy of Mercury from an earlier version, and only needs to be done the one time: it creates a new version of PMGATE.SYS that instructs Pegasus Mail to use the synonym file if it exists.
Note: in order to use synonyms in non-NetWare mode, you must be using Pegasus Mail for Windows v3.01b or later. Earlier versions will not recognize the synonym database and will use the user's regular e-mail address instead.
> its been a while how do I set up the synonym file
From the help.  I took out the Netware stuff.
Address Synonyms
Many sites need to use custom address formats where the user's e-mail address is quite different from his actual user name on the system. For example, you may want your addresses to have the form Firstname.Lastname@host.domain. Simple aliasing won't allow you to do this kind of addressing easily - it will handle incoming mail well enough, but in order to get mail going out from your system to use the alternative address forms requires the co-operation of your mail client.
Pegasus Mail and Mercury/32 can combine to support alternative address forms like this (referred to as synonyms) using a special database called a synonym database: Mercury needs this database so it can work out the recipient for incoming mail, while Pegasus Mail needs it to work out what address it should write into outgoing messages. Using synonyms differs slightly depending on whether or not you are running in Novell NetWare mode:
*   If either Pegasus Mail or Mercury is running in non-NetWare mode,
    then you will need to follow these steps:
1: Create a synonym source file: this is a text file where each line has the form
synonym == username
So, on the left-hand side you place the user's e-mail address as you want it to appear in outgoing mail, and on the right hand side his or her local user name. Note that each line must begin hard against the left-hand margin.
2: Compile the source file using the FSYNONYM commandline program. FSYNONYM takes your input file and creates a synonym database file.
3: Copy the synonym database somewhere accessible by Mercury, and make sure the Synonym database file entry of the Files/Directories preferences page of the Mercury core module configuration dialog refers to that file.
4: Copy the synonym database file into the same directory as your copy of the Pegasus Mail executable file (either WINPMAIL.EXE or WINPM-32.EXE), making sure it is called SYNONYM.MER.
5: [Only required once] Use the Pegasus Mail option on the Mercury configuration menu to configure your copy of Pegasus Mail. This operation is only required if you have upgraded your copy of Mercury from an earlier version, and only needs to be done the one time: it creates a new version of PMGATE.SYS that instructs Pegasus Mail to use the synonym file if it exists.
Note: in order to use synonyms in non-NetWare mode, you must be using Pegasus Mail for Windows v3.01b or later. Earlier versions will not recognize the synonym database and will use the user's regular e-mail address instead.