【发布时间】：2016-10-12 12:08:54
【问题描述】：
假设您有多个帐户附加到您的 Outlook 客户端，并且希望能够选择使用 VBA 从哪个帐户发送邮件。你做什么工作？ MailItem.SendUsingAccount 参数看起来是正确的方法，建议在其他地方使用like here 或here 或here。但是，如果您应用 Developer Reference 中的示例，则可能无法将 SendUsingAccount 属性设置为有效的 Accounts。为什么？
这似乎是答案：您必须将 MailItem 调暗为对象，而不调暗为 Outlook.Mailitem。具有一个或多个 Exchange 帐户的 Outlook 客户端似乎无法可靠地将帐户分配给 MailItem。但是，出于某种奇怪的原因，如果改为使用 Dim As Object，则可以将 Account 附加到该 Object。尽管该对象具有 MailItem 的属性，但它的行为 更好？？？ ...奇怪...
注意：代表其他人发送邮件符合稍微不同的要求。
以下代码演示了问题和运行中的解决方案。如果有其他解决方案或者我遗漏了什么，请告诉我。
运行代码并记下 Msgbox 信息后，在即时窗口中查看已完成操作的摘要。打印的摘要比包含大量 Debug.Print 语句的代码更清晰。有3个例程。主要测试例程和 2 从您的系统获取帐户详细信息。
（现在作为separate questionvacip 的建议发布） 创建 MailItems 时，它们具有默认帐户的特征，例如可能需要更改的签名等。如果有人知道创建具有所选帐户特征的初始 MailItem 的好方法，避免大量复制/粘贴/分配，请告诉我。
Private Sub TestSendingAccountProblems()
'This test demonstrates the problems that occur when trying to set
' the SendingAccount of a MailItem in Outlook.
'In summary, it appears that when an Outlook client has an Exchange account attached,
' it is only possible to set the SendingAccount of a MailItem if
' THE MailItem IS CREATED AS AN OBJECT.
' A bare MailItem fails with an ERROR.
'The MailItem's SendingAccount can be set to Pop3 or Exchange, so long as the MailItem is an Object.
'It does not seem to matter whether a Pop3 or an Exchange Mailbox is active at the time.
' Choosing different mailboxes causes different signatures to be appended,(if set) but
' does not affect this SendingAccount behaviour.
'The behaviour probably is different if no Exchange account is attached - try it on your
' Outlook client if you have such a system. Look at the listings in the Immediate Window &
' let us all know what you discover. (Cntrl-G in the VBIDE for the Immediate Window)
'All the Print statements make this and the routines it calls rather hard to read.
'You can start by just running it!
Dim appOl As Outlook.Application
Dim objNameSpace As Outlook.NameSpace
Dim olMailItem As Outlook.MailItem
Dim objOutlookMsg As Object
Dim SendingAccount As Outlook.Account
Dim sOlPOP3Account As String
Dim sOlExchangeAccount As String
Dim arr() As String
Dim i As Long
Dim NumAccts As Long
Dim S As String
Debug.Print String(100, "=")
Set appOl = Outlook.Application
Set objNameSpace = appOl.GetNamespace("MAPI")
'Notice that the Creation statements here are identical, this creates an Object to contain the MailItem
Set objOutlookMsg = appOl.CreateItem(olItemType.olMailItem) 'This creates an Object to contain the MailItem
Set olMailItem = appOl.CreateItem(olItemType.olMailItem) 'This creates a straightforward Mailitem.
'The line above creates a MailItem.
'The only difference is that olMailItem is explicitly Dimensioned as an Outlook.MailItem.
'Write out the status
S = objOutlookMsg.UserProperties.Session.CurrentUser.AddressEntry.Address
Debug.Print "objOutlookMsg was created by a user with this Address: " & S
S = olMailItem.UserProperties.Session.CurrentUser.AddressEntry.Address
Debug.Print "olMailItem was created by a user with this Address: " & S
If objOutlookMsg.SendUsingAccount Is Nothing Then
Debug.Print "objOutlookMsg.SendUsingAccount has no account specified on creation "
Else
Debug.Print "objOutlookMsg.SendUsingAccount.DisplayName = " & objOutlookMsg.SendUsingAccount.DisplayName
End If
If olMailItem.SendUsingAccount Is Nothing Then
Debug.Print "olMailItem.SendUsingAccount has no account specified on creation "
Else
Debug.Print "olMailItem.SendUsingAccount.DisplayName = " & olMailItem.SendUsingAccount.DisplayName
End If
'Collect the Account DisplayNames
'The strings here must be the Account Name. To see these, do this:
'Outlook Ribbon: File>Account Settings>AccountSettings-Name column.
' You can enter your own accounts here, but it is easier to let it fetch them all for you using the code below.
' sOlPOP3Account = "my.name@POP3server.com"
' sOlExchangeAccount = "my.name@ExchangeServer.com"
'ReDim arr(1 To 2)
' NumAccts = 2
' arr(1) = sOlPOP3Account
' arr(2) = sOlExchangeAccount
'
'Automatically includes up to 10 accounts
NumAccts = 0
For i = 1 To 10
' Choose all accounts or just one of these: (don't leave both exposed)
S = GetAccountNameOfType(vbNullString) 'This will get all accounts that are accessible from the Outlook client'
' S = GetAccountNameOfType("POP3") 'This will get only the Pop3 accounts that are accessible from the Outlook client
If S = vbNullString Then Exit For
NumAccts = NumAccts + 1
ReDim Preserve arr(1 To NumAccts)
arr(NumAccts) = S
Next i
For i = 1 To NumAccts
S = GetAccountType(arr(i), i)
On Error Resume Next
Set SendingAccount = appOl.Session.Accounts.Item(arr(i))
If ERR <> 0 Or SendingAccount Is Nothing Then
Debug.Print String(20, "-") & vbLf & S & " account could NOT be set to variable SendingAccount. The " & S & " account has .DisplayName = " & arr(i)
Else
Debug.Print String(20, "+") & vbLf & S & " account WAS set to variable SendingAccount. The " & S & " account has .DisplayName = " & arr(i)
End If
'Works fine in all scenarios tested using an Outlook client with an Exchange account attached.
Object ' The Watch Window shows .SendingAccount = chosen Account of Type = Account/Account
On Error Resume Next
Set objOutlookMsg.SendUsingAccount = SendingAccount
If ERR <> 0 Then
Debug.Print "objOutlookMsg.SendUsingAccount was NOT SET. The Error number is " & ERR & ", Description: " & ERR.Description & " - look at what was printed above for status of the SendingAccount (or look above/check in the Watch window if stepping through.)"
Else
Debug.Print "objOutlookMsg.SendUsingAccount was set successfully to: " & objOutlookMsg.SendUsingAccount.DisplayName
End If
On Error Resume Next
'Fails .in all scenarios tested using an Outlook client with an Exchange account attached.
' The Watch Window shows .SendingAccount = chosen Account of Type = Account/Account
Set olMailItem.SendUsingAccount = SendingAccount
If ERR <> 0 Then
Debug.Print " olMailItem.SendUsingAccount was NOT SET. The Error number is " & ERR & ", Description: " & ERR.Description & " (the SendingAccount may be 'Nothing' - look above/check in the Watch window.)"
Else
Debug.Print " olMailItem.SendUsingAccount was set successfully to: " & olMailItem.SendUsingAccount.DisplayName
End If
Next i
'Clean up
Set appOl = Nothing
Set objNameSpace = Nothing
Set olMailItem = Nothing
Set objOutlookMsg = Nothing
Set SendingAccount = Nothing
End Sub'Started with code from:
'https://social.msdn.microsoft.com/Forums/en-US/7a8bed41-a28f-41aa-bbc5-bfb8057a7bc4/stuck-on-how-to-get-sendusingaccount-to-work?forum=isvvba
'revised to create 2 functions that return the current account's status and displays all the accounts at one time, neatly lined up
'and another that finds accounts of a specified type.
Private Function GetAccountType(sForDisplayName As String, _
Optional lDisplayMessage As Long) As String
' Returns the type of the account named sForDisplayName.
' Shows a message listing all the accounts and types only if lDisplayMessage is = +1 or -1.
'NOTE: If changes to the email accounts have been made in Outlook _
then must close Outlook and Re-Open before any of this works properly.
Dim objOutlook As Object
Dim objNameSpace As Object
Dim strAccountType As String
Dim strOlNameAccountType As String
Dim Account As Outlook.Account
Dim i As Long
Dim HitNum As Long
Dim bAcc As Boolean 'Determines whether the Account Type or the Account name of the next Account of Given Type is returned
Dim S As String 'Scratch string
Dim S1 As String 'Scratch string
Static LenStr As Long 'The Length of the display string in the MsgBox window
Static lGT As Long 'Account number within NumAccts that we have reached
Static sLstAcType As String 'The last Account type that was specified in sGetNextAccountOfType
Static NumAccts As Long 'The number of Accounts
Set objOutlook = CreateObject("Outlook.Application")
Set objNameSpace = objOutlook.GetNamespace("MAPI")
LenStr = 40
DO_AGAIN: 'Returns to here if the account names are found to be long
S = vbNullString
For i = 1 To objNameSpace.Session.Accounts.Count
Set Account = objNameSpace.Session.Accounts.Item(i)
If Len(Account.DisplayName) + 10 + 1 > LenStr Then
LenStr = Len(Account.DisplayName) + 10 + 1
If LenStr > 86 Then LenStr = 86: GoTo GET_ON_WITH_IT
GoTo DO_AGAIN
End If
GET_ON_WITH_IT:
With Account
S1 = Right(String(LenStr - 10, "-") & Account.DisplayName, LenStr - 10)
Select Case .AccountType
Case 0
strAccountType = "Exchange"
strOlNameAccountType = Right(String(10, "-") & "olExchange", 10) 'Watch Window shows olExchange
Case 2
strAccountType = "POP3"
strOlNameAccountType = Right(String(10, "-") & "olPop3", 10) 'Watch Window shows olExchange
Case Else
strAccountType = "Not POP3 or Exchange Account"
strOlNameAccountType = Right(String(10, "-") & "Not P3/Exg", 10) 'Don't know what Watch Window shows!
End Select
S = S & i & "-" & Right(String(LenStr + 1, "-") & S1 & vbTab & "-" & strOlNameAccountType, LenStr + 1) & vbLf
If Abs(lDisplayMessage) = 1 Then _
Debug.Print Replace(i & "-" & Right(String(LenStr + 1, "-") & S1 & vbTab & "-" & strOlNameAccountType, LenStr + 1), "-", " ")
If .DisplayName = sForDisplayName Then
GetAccountType = strAccountType
End If
End With
Next i
NumAccts = i - 1
'Only displays when lDisplayMessage = +1 or -1. Defaults to not displaying if lDisplayMessage is is unset.
If Abs(lDisplayMessage) = 1 Then _
MsgBox String(86, "-") & vbLf & "List of all Email Accounts on " & Environ$("computername") & ":" & vbLf & _
Left("- Account " & String(LenStr - Len("- Account " & vbTab & "Type"), "-"), LenStr) & vbTab & "Type" & vbLf & _
S & vbLf & _
String(86, "-")
Set objNameSpace = Nothing
Set objOutlook = Nothing
Set Account = Nothing
End Function
Private Function GetAccountNameOfType(sTypeToGet As String) As String
' Gets the next account of the given type.
' Called repeatedly with the same sTypeToGet returns a Null string on the last found (or if none are).
' If the VBIDE is reset, it starts again at the beginning.
'NOTE: If changes to the email accounts have been made in Outlook _
then must close Outlook and Re-Open before any of this works properly.
Dim objOutlook As Object
Dim objNameSpace As Object
Dim strAccountType As String
Dim Account As Outlook.Account
Dim i As Long
Dim HitNum As Long
Dim bInit As Boolean 'It is an initialisation run
Static lGT As Long 'Account number within NumAccts that we have reached
Static sLstAcType As String 'The last Account type that was specified in sTypeToGet
Static NumAccts As Long 'The number of Accounts
If NumAccts > 0 Then
lGT = lGT + 1 'Get the next hit
Else
bInit = True 'Be sure to count the accounts on the first run
lGT = 1 'and when the last exit resulted in no hit
End If
Set objOutlook = CreateObject("Outlook.Application")
Set objNameSpace = objOutlook.GetNamespace("MAPI")
For i = 1 To objNameSpace.Session.Accounts.Count
Set Account = objNameSpace.Session.Accounts.Item(i)
With Account
Select Case .AccountType
Case 0
strAccountType = "Exchange"
Case 2
strAccountType = "POP3"
Case Else
strAccountType = "Not POP3 or Exchange Account"
End Select
If UCase(strAccountType) = UCase(sTypeToGet) Or sTypeToGet = vbNullString Then
HitNum = HitNum + 1
If HitNum = lGT Then
GetAccountNameOfType = Account.DisplayName
If Not bInit Then
If sTypeToGet <> vbNullString Then NumAccts = HitNum
GoTo FOUNDIT
End If
End If
End If
End With
Next i
If Not bInit Then
If GetAccountNameOfType = vbNullString Then
NumAccts = 0
Else
NumAccts = i - 1
End If
Else
NumAccts = i - 1 'Always keep a count when initialising
End If
FOUNDIT:
sLstAcType = sTypeToGet
Set objNameSpace = Nothing
Set objOutlook = Nothing
Set Account = Nothing
End Function
'https://social.msdn.microsoft.com/Forums/en-US/7a8bed41-a28f-41aa-bbc5-bfb8057a7bc4/stuck-on-how-to-get-sendusingaccount-to-work?forum=isvvba
'was heavily adapted to create 2 functions that return the current account's status and displays all the accounts at one time, neatly lined up
'and another that finds accounts of a specified type.
Private Function GetAccountType(sForDisplayName As String, _
Optional lDisplayMessage As Long) As String
' Returns the type of the account named sForDisplayName.
' Shows a message listing all the accounts and types only if lDisplayMessage is = +1 or -1.
'NOTE: If changes to the email accounts have been made in Outlook _
then must close Outlook and Re-Open before any of this works properly.
Dim objOutlook As Object
Dim objNameSpace As Object
Dim strAccountType As String
Dim strOlNameAccountType As String
Dim Account As Outlook.Account
Dim i As Long
Dim HitNum As Long
Dim bAcc As Boolean 'Determines whether the Account Type or the Account name of the next Account of Given Type is returned
Dim S As String 'Scratch string
Dim S1 As String 'Scratch string
Static LenStr As Long 'The Length of the display string in the MsgBox window
Static lGT As Long 'Account number within NumAccts that we have reached
Static sLstAcType As String 'The last Account type that was specified in sGetNextAccountOfType
Static NumAccts As Long 'The number of Accounts
Set objOutlook = CreateObject("Outlook.Application")
Set objNameSpace = objOutlook.GetNamespace("MAPI")
LenStr = 40
DO_AGAIN: 'Returns to here if the account names are found to be long
S = vbNullString
For i = 1 To objNameSpace.Session.Accounts.Count
Set Account = objNameSpace.Session.Accounts.Item(i)
If Len(Account.DisplayName) + 10 + 1 > LenStr Then
LenStr = Len(Account.DisplayName) + 10 + 1
If LenStr > 86 Then LenStr = 86: GoTo GET_ON_WITH_IT
GoTo DO_AGAIN
End If
GET_ON_WITH_IT:
With Account
S1 = Right(String(LenStr - 10, "-") & Account.DisplayName, LenStr - 10)
Select Case .AccountType
Case 0
strAccountType = "Exchange"
strOlNameAccountType = Right(String(10, "-") & "olExchange", 10) 'Watch Window shows olExchange
Case 2
strAccountType = "POP3"
strOlNameAccountType = Right(String(10, "-") & "olPop3", 10) 'Watch Window shows olExchange
Case Else
strAccountType = "Not POP3 or Exchange Account"
strOlNameAccountType = Right(String(10, "-") & "Not P3/Exg", 10) 'Don't know what Watch Window shows!
End Select
S = S & i & "-" & Right(String(LenStr + 1, "-") & S1 & vbTab & "-" & strOlNameAccountType, LenStr + 1) & vbLf
If Abs(lDisplayMessage) = 1 Then _
Debug.Print Replace(i & "-" & Right(String(LenStr + 1, "-") & S1 & vbTab & "-" & strOlNameAccountType, LenStr + 1), "-", " ")
If .DisplayName = sForDisplayName Then
GetAccountType = strAccountType
End If
End With
Next i
NumAccts = i - 1
'Only displays when lDisplayMessage = +1 or -1. Defaults to not displaying if lDisplayMessage is is unset.
If Abs(lDisplayMessage) = 1 Then _
MsgBox String(86, "-") & vbLf & "List of all Email Accounts on " & Environ$("computername") & ":" & vbLf & _
Left("- Account " & String(LenStr - Len("- Account " & vbTab & "Type"), "-"), LenStr) & vbTab & "Type" & vbLf & _
S & vbLf & _
String(86, "-")
Set objNameSpace = Nothing
Set objOutlook = Nothing
Set Account = Nothing
End Function
Private Function GetAccountNameOfType(sTypeToGet As String) As String
' Gets the next account of the given type.
' Called repeatedly with the same sTypeToGet returns a Null string on the last found (or if none are).
' If the VBIDE is reset, it starts again at the beginning.
'NOTE: If changes to the email accounts have been made in Outlook _
then must close Outlook and Re-Open before any of this works properly.
Dim objOutlook As Object
Dim objNameSpace As Object
Dim strAccountType As String
Dim Account As Outlook.Account
Dim i As Long
Dim HitNum As Long
Dim bInit As Boolean 'It is an initialisation run
Static lGT As Long 'Account number within NumAccts that we have reached
Static sLstAcType As String 'The last Account type that was specified in sTypeToGet
Static NumAccts As Long 'The number of Accounts
If NumAccts > 0 Then
lGT = lGT + 1 'Get the next hit
Else
bInit = True 'Be sure to count the accounts on the first run
lGT = 1 'and when the last exit resulted in no hit
End If
Set objOutlook = CreateObject("Outlook.Application")
Set objNameSpace = objOutlook.GetNamespace("MAPI")
For i = 1 To objNameSpace.Session.Accounts.Count
Set Account = objNameSpace.Session.Accounts.Item(i)
With Account
Select Case .AccountType
Case 0
strAccountType = "Exchange"
Case 2
strAccountType = "POP3"
Case Else
strAccountType = "Not POP3 or Exchange Account"
End Select
If UCase(strAccountType) = UCase(sTypeToGet) Or sTypeToGet = vbNullString Then
HitNum = HitNum + 1
If HitNum = lGT Then
GetAccountNameOfType = Account.DisplayName
If Not bInit Then
If sTypeToGet <> vbNullString Then NumAccts = HitNum
GoTo FOUNDIT
End If
End If
End If
End With
Next i
If Not bInit Then
If GetAccountNameOfType = vbNullString Then
NumAccts = 0
Else
NumAccts = i - 1
End If
Else
NumAccts = i - 1 'Always keep a count when initialising
End If
FOUNDIT:
sLstAcType = sTypeToGet
Set objNameSpace = Nothing
Set objOutlook = Nothing
Set Account = Nothing
End Function
以下是在附加了 2 个 POP3 和 1 个 Exchange 帐户的 Outlook 客户端上运行此程序的输出示例：
''====================================================================================================
''objOutlookMsg was created by a user with this Address: /o=ExchangeLabs/ou=Exchange Administrative Group (lotsofcharacter)/cn=Recipients/cn=longhexnumberisplacedherefollowe-dname
''olMailItem was created by a user with this Address: /o=ExchangeLabs/ou=Exchange Administrative Group (lotsofcharacter)/cn=Recipients/cn=longhexnumberisplacedherefollowe-dname
''objOutlookMsg.SendUsingAccount has no account specified on creation
''olMailItem.SendUsingAccount has no account specified on creation
''olMailItem.SendUsingAccount has no account specified on creation
''1 joey.bloggs@POP3server.com olPop3
''2 jane.blogginnss@POP3server.com olPop3
''3 X@exchangeserver.com olExchange
''++++++++++++++++++++
''POP3 account WAS set to variable SendingAccount. The POP3 account has .DisplayName = joey.bloggs@POP3server.com
''objOutlookMsg.SendUsingAccount was set successfully to: joey.bloggs@POP3server.com
'' olMailItem.SendUsingAccount was NOT SET. The Error number is 91, Description: Object variable or With block variable not set (the SendingAccount may be 'Nothing' - look above/check in the Watch window.)
''++++++++++++++++++++
''POP3 account WAS set to variable SendingAccount. The POP3 account has .DisplayName = jane.blogginnss@POP3server.com
''objOutlookMsg.SendUsingAccount was set successfully to: jane.blogginnss@POP3server.com
'' olMailItem.SendUsingAccount was NOT SET. The Error number is 91, Description: Object variable or With block variable not set (the SendingAccount may be 'Nothing' - look above/check in the Watch window.)
''++++++++++++++++++++
''Exchange account WAS set to variable SendingAccount. The Exchange account has .DisplayName = X@exchangeserver.com
''objOutlookMsg.SendUsingAccount was set successfully to: X@exchangeserver.com
'' olMailItem.SendUsingAccount was NOT SET. The Error number is 91, Description: Object variable or With block variable not set (the SendingAccount may be 'Nothing' - look above/check in the Watch window.)
【问题讨论】：