Extract all sender's email addresses from emails

[gisp]

Sure.

See the code below. Save it as .py file. It is crude but does the job.
Change here:

pop_conn = poplib.POP3_SSL('mx.mail.com', '995')
pop_conn.user('youremail@someting.com')
pop_conn.pass_('password') 

It will process 100 email in 8 seconds (your speed may vary), so leave it be.
It will put all email addresses in a text file with append option, so if it fails, delete the content of the txt file so far.
Emails will be extracted from the 'from' header so possibly very messy. You will need to process the list in excel (other) to get rid of duplication etc.

print >> open('emails-list.txt', 'a'), message['from'] 

import poplib,time
from email import parser

pop_conn = poplib.POP3_SSL('mx.mail.com', '995')
pop_conn.user('youremail@someting.com')
pop_conn.pass_('password')

#Get messages from server:
stt=time.ctime()
print 'getting messages started at %s\n' %(stt)


messages = [pop_conn.top(i,0) for i in range(1, len(pop_conn.list()[1]) + 1)]


endt=time.ctime()
print 'done getting messages at %s\n' %(endt)

# Concat message pieces:
messages = ["\n".join(mssg[1]) for mssg in messages]

#Parse message intom an email object:
messages = [parser.Parser().parsestr(mssg) for mssg in messages]


for message in messages:
print >> open('emails-list.txt', 'a'), message['from']

pop_conn.quit()

[xoggoth]

a) Dumping the lot to excel and binning everything but the 'From' info

Excel VBA does it quite easily. Used to do it to check order emails until they started putting everything into PDF.

Code below is quick untested extract from a much more complicated thing so probably got a few errors, but close enough.

'Option Compare Text
Public r As Integer

Private Sub CommandButton1_Click()
Dim fold As String

'clear list
Range("A15:A500").Select
Selection.ClearContents
Range("A15").Select

'sheet row
r = 1

'For each folder in list
fol = 1
Do
fold = Range("C5").Cells(fol, 1).Value
If fold <> "" Then
getemails (fold)
fol = fol + 1
End If
Range("AF2").Value = fol
Loop While fold <> ""

End Sub

Sub getemails(mailpath As String)
Dim FSO As FileSystemObject
Dim fileList As Object, email As Object
Dim fname As String, fullpath As String
Dim temp As String As String

' Create an object form the filesystem object
Set FSO = CreateObject("Scripting.FileSystemObject")

'set output list
Set outlist = Range("A15")

' Traverse through the files
nmail = 0
For Each email In fileList

' Get the file name
fname = email.Name
If InStr(fname, ".eml") Then

'look for key fields in file - this is mostly ascii
fullpath = mailpath & "" & fname
Open fullpath For Input As #1
Do While (Not EOF(1))

Line Input #1, temp
temp = Trim(temp)

'get from line
If InStr(temp, "From: ") > 0) then
outlist.Cells(r, 1).Value = temp
Exit Do
End If
r=r+1
Loop
Close #1

Next

End Sub

[BR14]

Excel VBA does it quite easily. Used to do it to check order emails until they started putting everything into PDF.

Code below is quick untested extract from a much more complicated thing so probably got a few errors, but close enough.

'Option Compare Text
Public r As Integer

Private Sub CommandButton1_Click()
Dim fold As String

'clear list
Range("A15:A500").Select
Selection.ClearContents
Range("A15").Select

'sheet row
r = 1

'For each folder in list
fol = 1
Do
fold = Range("C5").Cells(fol, 1).Value
If fold <> "" Then
getemails (fold)
fol = fol + 1
End If
Range("AF2").Value = fol
Loop While fold <> ""

End Sub

Sub getemails(mailpath As String)
Dim FSO As FileSystemObject
Dim fileList As Object, email As Object
Dim fname As String, fullpath As String
Dim temp As String As String

' Create an object form the filesystem object
Set FSO = CreateObject("Scripting.FileSystemObject")

'set output list
Set outlist = Range("A15")

' Traverse through the files
nmail = 0
For Each email In fileList

' Get the file name
fname = email.Name
If InStr(fname, ".eml") Then

'look for key fields in file - this is mostly ascii
fullpath = mailpath & "" & fname
Open fullpath For Input As #1
Do While (Not EOF(1))

Line Input #1, temp
temp2 = Trim(temp)

'get from line
If InStr(temp, "From: ") > 0) then
outlist.Cells(r, 1).Value = temp
r=r+1
End If
Loop
Close #1

Next

End Sub

what are the inputs to this though? already extracted mail? in what format?

[xoggoth]

I used live mail on Windows at the time, emails were in Appdata\local. Don't know where Mac saves things by default but I daresay all email apps allow backup to folder of your choice. Some parts of emails are encoded but the headers are always plain text AFAIK.