TypeError: Cannot read properties of undefined (reading 'split')

[santa112233]

Hi,
Thanks for your fantastic work on this project. Unfortunately I have discoverd an error, but am probably not going to be able to provide much assistance to resolve the issue as I have no coding experiance. But thought I'd bring it to your attention anyway. I've been trying to run your tool on my inbox that contains about 124,000 messages, but it errors out when trying to write the results. I've been running it on windows and below is output displayed in powershell:

124308 - here: 'to' participant address is empty - Search: ===rfc822msgid:4E4BB4BA.EB27.0021.0@newcastle.edu.au=== 'prt.address === str_EMPTY'
124648 - here: 'to' participant not found - Search: ===rfc822msgid:AANLkTin-0wHPur0dxvAdA6KX2hLncU9AolDHTgkW8Sna@mail.gmail.com=== '!family'
C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:11
    const asArr = nonCleanId.split(/[<>]/);
                             ^

TypeError: Cannot read properties of undefined (reading 'split')
    at generateSearchableIdOfMail (C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:11:30)
    at getSearchableIdForToBeEasyToCopy (C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:18:65)
    at C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\sweetUtils.js:121:147
    at Array.map (<anonymous>)
    at getZenParticipantsFromFamily (C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\sweetUtils.js:117:34)
    at processParsedMail (C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailHeadersUtils.js:79:61)
    at C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailParsingUtils.js:92:46
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\santa\AppData\Local\npm-cache\_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailParsingUtils.js:5:58)
    at runNextTicks (node:internal/process/task_queues:65:5)

Node.js v22.14.0
PS C:\mboxhome>

I am happy to provide debugging assistance, but will need a lot of guidance.

Thanks
Paul

[leodevbro]

Hello, thanks for the feedback. The error seems very strange. It basically says that the mail (message) does not have an id (the id is undefined). It's very strange, because all mails should have an id like this:
<AANLkTin-0wHPur0dxvAdA6KX2hLncU9AolDHTgkW8Sna@mail.gmail.com>

Maybe the parser function does some mistake for specific mail. I'll try to update the gmail-mbox-stats software to ignore such strange mails and not throw error, but it does not guarantee success. But if your MBOX file is not too private, maybe you could send it to me, so I will be able to investigate it. Another way is that maybe you could download the source code of gmail-mbox-stats and I'll tell you how to add some debugging code, then run the software in your local environment, and we will see more informational logs for investigation.

[santa112233]

My MBOX is very large and contains personnel information so I'd prefer not to share it. However, if you are willing to guide me I'm happy to try and add the debugging in the code and run it locally. I have download the source code from Github but am not sure how to run it locally. A quick google suggest I may need to use the NPM package instead, but have not read up on Node.js / NPX / NPM. I'm comfortable in the command line and look to have python installed already if that helps?

[leodevbro]

@santa112233 , Well, I created a 6 minute video tutorial (which is basically 1 minute, but I was too slow : d )

With this video tutorial you will be able to download the gmail-mbox-stats source code and make some changes and switch from official gmail-mbox-stats software to custom software, and how to switch back when you want.

Video:
https://drive.google.com/file/d/1Gs1U-QZw4E2iI3z11ECe6SF-xeu1O8yI/view

When you get comfortable with switching between official and custom software, please make these changes for debugging:
Go to:
src/utils/mailHeadersUtils.ts -> export const processParsedMail function, and add this code:

  if (!initialMainInfoForThisMail["message-id"]) {
    console.log(
      "no message-id",
      initialMainInfoForThisMail["message-id"],
      theParsedMail.messageId,
      JSON.stringify(theParsedMail),
    );
  }

like this:

then in the VS Code, run:
npm i (shorthand for npm install) -> maybe not needed to run this for every change.
npm run compile
npm link -> maybe not needed to run this for every change.

then execute the software with npx...... command again to see the debugging logs.

[santa112233]

Hi @leodevbro, thanks so much for the video! It was a great help. I thought I might have had to boot into a linux environment, but manged to get it sorted in windows powershell and notepad++!

The custom code ran and errored out with the following additional debug info.

124169 - here: 'to' participant not found - Search: ===rfc822msgid:a277af1e0909252137y3e930c13jc3a4bf9e60f0556b@mail.gmail.com=== '!family'
124203 - here: 'to' participant not found - Search: ===rfc822msgid:CAHjZ1Qpn366OOTHqqK5ibNG11CJKa_X2pwjWOXNLHodjCEC--w@mail.gmail.com=== '!family'
124308 - here: 'to' participant address is empty - Search: ===rfc822msgid:4E4BB4BA.EB27.0021.0@newcastle.edu.au=== 'prt.address === str_EMPTY'
124647 - here: 'to' participant not found - Search: ===rfc822msgid:AANLkTin-0wHPur0dxvAdA6KX2hLncU9AolDHTgkW8Sna@mail.gmail.com=== '!family'
no message-id undefined undefined {"attachments":[],"headers":{},"headerLines":[{"key":"x-gm-thrid","line":"X-GM-THRID: 1267366184751721637"},{"key":"x-gmail-labels","line":"X-Gmail-Labels: Sent"},{"key":"to","line":"To: \"'Simon Piet'\""},{"key":"date","line":"Date: Sun, 20 Apr 2008 11:23:00 +1000"},{"key":"subject","line":"Subject: RE: fully sick gtir bro"},{"key":"from","line":"From: \"Paul santa112233\""},{"key":"content-type","line":"Content-type: text/html; charset=windows-1252"},{"key":"mime-version","line":"MIME-Version: 1.0"},{"key":"content-transfer-encoding","line":"Content-transfer-encoding: 8bit"}],"html":"<html xmlns:v=\"urn:schemas-microsoft-com:vml\" xmlns:o=\"urn:schemas-microsoft-com:office:office\" xmlns:w=\"urn:schemas-microsoft-com:office:word\" xmlns:st1=\"urn:schemas-microsoft-com:office:smarttags\" xmlns=\"http://www.w3.org/TR/REC-html40\">\n\n<head>\n<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=us-ascii\">\n<meta name=Generator content=\"Microsoft Word 11 (filtered medium)\">\n<!--[if !mso]>\n<style>\nv\\:* {behavior:url(#default#VML);}\no\\:* {behavior:url(#default#VML);}\nw\\:* {behavior:url(#default#VML);}\n.shape {behavior:url(#default#VML);}\n</style>\n<![endif]--><o:SmartTagType\n namespaceuri=\"urn:schemas-microsoft-com:office:smarttags\" name=\"City\"/>\n<o:SmartTagType namespaceuri=\"urn:schemas-microsoft-com:office:smarttags\"\n name=\"place\"/>\n<!--[if !mso]>\n<style>\nst1\\:*{behavior:url(#default#ieooui) }\n</style>\n<![endif]-->\n<style>\n<!--\n /* Font Definitions */\n @font-face\n\t{font-family:Tahoma;\n\tpanose-1:2 11 6 4 3 5 4 4 2 4;}\n /* Style Definitions */\n p.MsoNormal, li.MsoNormal, div.MsoNormal\n\t{margin:0cm;\n\tmargin-bottom:.0001pt;\n\tfont-size:12.0pt;\n\tfont-family:\"Times New Roman\";}\na:link, span.MsoHyperlink\n\t{color:blue;\n\ttext-decoration:underline;}\na:visited, span.MsoHyperlinkFollowed\n\t{color:blue;\n\ttext-decoration:underline;}\np\n\t{mso-margin-top-alt:auto;\n\tmargin-right:0cm;\n\tmso-margin-bottom-alt:auto;\n\tmargin-left:0cm;\n\tfont-size:12.0pt;\n\tfont-family:\"Times New Roman\";}\nspan.EmailStyle18\n\t{mso-style-type:personal-reply;\n\tfont-family:Arial;\n\tcolor:navy;}\n@page Section1\n\t{size:595.3pt 841.9pt;\n\tmargin:72.0pt 90.0pt 72.0pt 90.0pt;}\ndiv.Section1\n\t{page:Section1;}\n-->\n</style>\n\n</head>\n\n<body lang=EN-AU link=blue vlink=blue>\n\n<div class=Section1>\n\n<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:\n10.0pt;font-family:Arial;color:navy'>Id say his reserve will be set much higher\nthen $13k. But if <st1:City w:st=\"on\"><st1:place w:st=\"on\">ur</st1:place></st1:City>\ngoing to bid wait until lthe last 20 seconds of the aution. No point in bidding\nany earlier.<o:p></o:p></span></font></p>\n\n<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:\n10.0pt;font-family:Arial;color:navy'><o:p>&nbsp;</o:p></span></font></p>\n\n<div>\n\n<div class=MsoNormal align=center style='text-align:center'><font size=3\nface=\"Times New Roman\"><span lang=EN-US style='font-size:12.0pt'>\n\n<hr size=2 width=\"100%\" align=center tabindex=-1>\n\n</span></font></div>\n\n<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US\nstyle='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font\nsize=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>\nSimon Piet [mailto:*****@hotmail.com] <br>\n<b><span style='font-weight:bold'>Sent:</span></b> Sunday, 20 April 2008 7:56\nPM<br>\n<b><span style='font-weight:bold'>To:</span></b> *****@hotmail.com; Paul\nsanta112233; *****@edry.com.au<br>\n<b><span style='font-weight:bold'>Subject:</span></b> fully sick gtir bro</span></font><span\nlang=EN-US><o:p></o:p></span></p>\n\n</div>\n\n<p class=MsoNormal><font size=3 face=\"Times New Roman\"><span style='font-size:\n12.0pt'><o:p>&nbsp;</o:p></span></font></p>\n\n<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Tahoma><span\nstyle='font-size:10.0pt;font-family:Tahoma'>check out this&nbsp;gtir. pretty\nmad, only prob is its in vic so dunno how hard it is to get it registered in\nnsw.<br>\nwould be hard with that paint getting ppl not to scratch it but would be damn\nnice car.<br>\nStarts at 10k thats abit wierd, suppose it has to reach its reserve still but.\nhow much u reckon i shoudl bid on it. i reckon 13k cause thats my limit area\nanyway so might pick up a bargain. wouldnt get to see it b4 buying it but lol<o:p></o:p></span></font></p>\n\n<div class=MsoNormal align=center style='text-align:center'><font size=2\nface=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>\n\n<hr size=2 width=\"100%\" align=center>\n\n</span></font></div>\n\n<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;\nfont-family:Tahoma'>Grab it. <a href=\"http://mycareer.com.au/?s_cid=596065%20\"\ntarget=\"_new\">You dream job is up for grabs.</a><o:p></o:p></span></font></p>\n\n</div>\n\n</body>\n\n</html>\n\n\n","text":"Id say his reserve will be set much higher then $13k. But if ur going to bid\nwait until lthe last 20 seconds of the aution. No point in bidding any earlier.\n\n \n\n--------------------------------------------------------------------------------\n\nFrom: Simon Piet [mailto:*****@hotmail.com]\nSent: Sunday, 20 April 2008 7:56 PM\nTo: *****@hotmail.com; Paul santa112233; *****@edry.com.au\nSubject: fully sick gtir bro\n\n \n\ncheck out this gtir. pretty mad, only prob is its in vic so dunno how hard it is\nto get it registered in nsw.\nwould be hard with that paint getting ppl not to scratch it but would be damn\nnice car.\nStarts at 10k thats abit wierd, suppose it has to reach its reserve still but.\nhow much u reckon i shoudl bid on it. i reckon 13k cause thats my limit area\nanyway so might pick up a bargain. wouldnt get to see it b4 buying it but lol\n\n--------------------------------------------------------------------------------\n\nGrab it. You dream job is up for grabs.\n[http://mycareer.com.au/?s_cid=596065%20]","textAsHtml":"<p>Id say his reserve will be set much higher then $13k. But if ur going to bid<br/>wait until lthe last 20 seconds of the aution. No point in bidding any earlier.</p><p>&nbsp;</p><p>--------------------------------------------------------------------------------</p><p>From: Simon Piet [<a href=\"mailto:*****@hotmail.com\">mailto:*****@hotmail.com</a>]<br/>Sent: Sunday, 20 April 2008 7:56 PM<br/>To: <a href=\"mailto:*****@hotmail.com\">*****@hotmail.com</a>; Paul santa112233; <a href=\"mailto:*****@edry.com.au\">*****@edry.com.au</a><br/>Subject: fully sick gtir bro</p><p>&nbsp;</p><p>check out this&nbsp;gtir. pretty mad, only prob is its in vic so dunno how hard it is<br/>to get it registered in nsw.<br/>would be hard with that paint getting ppl not to scratch it but would be damn<br/>nice car.<br/>Starts at 10k thats abit wierd, suppose it has to reach its reserve still but.<br/>how much u reckon i shoudl bid on it. i reckon 13k cause thats my limit area<br/>anyway so might pick up a bargain. wouldnt get to see it b4 buying it but lol</p><p>--------------------------------------------------------------------------------</p><p>Grab it. You dream job is up for grabs.<br/>[<a href=\"http://mycareer.com.au/?s_cid=596065%20\">http://mycareer.com.au/?s_cid=596065%20</a>]</p>","subject":"RE: fully sick gtir bro","date":"2008-04-20T01:23:00.000Z","to":{"value":[{"address":"","name":"'Simon Piet'"}],"html":"<span class=\"mp_address_group\"><span class=\"mp_address_name\">&#x27;Simon Piet&#x27;</span></span>","text":"\"'Simon Piet'\""},"from":{"value":[{"address":"","name":"Paul santa112233"}],"html":"<span class=\"mp_address_group\"><span class=\"mp_address_name\">Paul santa112233</span></span>","text":"\"Paul santa112233\""}}
C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\statsBuilder.js:11
    const asArr = nonCleanId.split(/[<>]/);
                             ^

TypeError: Cannot read properties of undefined (reading 'split')
    at generateSearchableIdOfMail (C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\statsBuilder.js:11:30)
    at getSearchableIdForToBeEasyToCopy (C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\statsBuilder.js:18:65)
    at C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\sweetUtils.js:121:147
    at Array.map (<anonymous>)
    at getZenParticipantsFromFamily (C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\sweetUtils.js:117:34)
    at processParsedMail (C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\mailHeadersUtils.js:83:61)
    at C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\mailParsingUtils.js:92:46
    at Generator.next (<anonymous>)
    at fulfilled (C:\mboxhome\gmail-mbox-stats-main\buildJS\utils\mailParsingUtils.js:5:58)
    at runNextTicks (node:internal/process/task_queues:65:5)

Node.js v22.14.0
PS C:\mboxhome\gmail-mbox-stats-main> 

I have found the email in my gmail inbox, but have not been able to find software on windows to edit my mbox file yet and now need to go to bed. Do you have any recommendations on either windows or linux that I can edit the mbox file to delete the email listed above?

Thanks
Paul

[leodevbro]

Seems like the cause of the problem is that some mails are very old, from 2008. Gmail system is known to have sometimes stored very old emails with some anomalies of data. Well, I'd suggest to go here again:
src/utils/mailHeadersUtils.ts -> export const processParsedMail function, and add this code:

  if (!initialMainInfoForThisMail["message-id"]) {
    // Generate a fallback message-id if missing using Math.random
    const customId = `<generated-fallback-id-${Math.random()}@a.com>` as const;
    initialMainInfoForThisMail["message-id"] = customId;
    console.warn(
      `Generated fallback message-id: ${customId}`,
      theParsedMail.date,
      theParsedMail.to,
      theParsedMail.from,
      theParsedMail.text,
    );
  }

like this:

Then npm run compile and then execute the custom code with npx ...... command and I guess it will analyze the full MBOX file successfully.

One more thing to consider, is that maybe counting/statistics of mails will be slightly wrong, maybe it will be able to analyze 10 mails less than all, or maybe 100 mails less, depending on how many mails are strange like the 2008 mail. Or maybe it will be able to analyze all mails if only id is missing and all other data (from, to, date...) is there.

Since this code console.warn(`Generated fallback message-id: ${init_messageId}`); logs the existence of such strange mails, you will be able to count those strange mails.

[kodama12]

Good evening here,

just saying, on windows 10n, i got exactly the same issue.
it's running, but at the end an error, files are generated but empty 0Kb . Thanxs for help

C:\Users\XXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:11

const asArr = nonCleanId.split(/[<>]/);
                         ^

TypeError: Cannot read properties of undefined (reading 'split')
at generateSearchableIdOfMail (C:\UsersXXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:11:30)
at getSearchableIdForToBeEasyToCopy (C:\UsersXXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\statsBuilder.js:18:65)
at getZenParticipantsFromFamily (C:\UsersXXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\sweetUtils.js:84:140)
at processParsedMail (C:\UsersXXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailHeadersUtils.js:100:62)
at C:\UsersXXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailParsingUtils.js:92:46
at Generator.next ()
at fulfilled (C:\Users\XXXX\AppData\Local\npm-cache_npx\ad1668ac50f1422b\node_modules\gmail-mbox-stats\buildJS\utils\mailParsingUtils.js:5:58)
at runNextTicks (node:internal/process/task_queues:65:5)
at process.processImmediate (node:internal/timers:459:9)

Node.js v22.14.0

[kodama12]

Seems like the cause of the problem is that some mails are very old, from 2008. Gmail system is known to have sometimes stored very old emails with some anomalies of data. Well, I'd suggest to go here again: src/utils/mailHeadersUtils.ts -> export const processParsedMail function, and add this code:

if (!initialMainInfoForThisMail["message-id"]) {
// Generate a fallback message-id if missing using Math.random
const customId = <generated-fallback-id-${Math.random()}@a.com> as const;
initialMainInfoForThisMail["message-id"] = customId;
console.warn(
Generated fallback message-id: ${customId},
theParsedMail.date,
theParsedMail.to,
theParsedMail.from,
theParsedMail.text,
);
}

like this:

Then npm run compile and then execute the custom code with npx ...... command and I guess it will analyze the full MBOX file successfully.

One more thing to consider, is that maybe counting/statistics of mails will be slightly wrong, maybe it will be able to analyze 10 mails less than all, or maybe 100 mails less, depending on how many mails are strange like the 2008 mail. Or maybe it will be able to analyze all mails if only id is missing and all other data (from, to, date...) is there.

Since this code console.warn(`Generated fallback message-id: ${init_messageId}`); logs the existence of such strange mails, you will be able to count those strange mails.

Yes, i got email before 2008 in it, that's right. About the solution you ask to try, how to do it, i don'sett how and where i can edit your own code ?

Thanxs

[leodevbro]

@kodama12 , Please read all the comments here. from the start. you will umderstand how to do it. There is also a link of video tutorial here in the comments.

[kodama12]

@kodama12 , Please read all the comments here. from the start. you will umderstand how to do it. There is also a link of video tutorial here in the comments.

sorry sir, i just created a fork, edit it on github right ? Edit the code, added the part you corrected above, but i'm stuck on the next step.

_

"Then npm run compile and then execute the custom code with npx ...... command and I guess it will analyze the full MBOX file successfully."

_

Sorry where do i execute npm run compile, and how i execute my "fork" of your script ? :(

Thanks

[leodevbro]

@kodama12 , please find the video tutorial link here in the comments. The video tutorial shows Linux OS, but it can be done the same way in Windows and Mac.

[kodama12]

@kodama12 , please find the video tutorial link here in the comments. The video tutorial shows Linux OS, but it can be done the same way in Windows and Mac.

Thanks, i've just seen that i need 2 code updates !

[santa112233]

@leodevbro confirming the code changes you provided in the message bellow were successful and the mail stat .csv files were all generated. Thanks so much for helping me debug this!! :) I can now start cleaning and deleting old mail out of my inbox!

Seems like the cause of the problem is that some mails are very old, from 2008. Gmail system is known to have sometimes stored very old emails with some anomalies of data. Well, I'd suggest to go here again: src/utils/mailHeadersUtils.ts -> export const processParsedMail function, and add this code:
if (!initialMainInfoForThisMail["message-id"]) {
// Generate a fallback message-id if missing using Math.random
const customId = <generated-fallback-id-${Math.random()}@a.com> as const;
initialMainInfoForThisMail["message-id"] = customId;
console.warn(
Generated fallback message-id: ${customId},
theParsedMail.date,
theParsedMail.to,
theParsedMail.from,
theParsedMail.text,
);
}
like this:

Then npm run compile and then execute the custom code with npx ...... command and I guess it will analyze the full MBOX file successfully.
One more thing to consider, is that maybe counting/statistics of mails will be slightly wrong, maybe it will be able to analyze 10 mails less than all, or maybe 100 mails less, depending on how many mails are strange like the 2008 mail. Or maybe it will be able to analyze all mails if only id is missing and all other data (from, to, date...) is there.
Since this code console.warn(`Generated fallback message-id: ${init_messageId}`); logs the existence of such strange mails, you will be able to count those strange mails.

Yes, i got email before 2008 in it, that's right. About the solution you ask to try, how to do it, i don'sett how and where i can edit your own code ?

Thanxs

[leodevbro]

@santa112233 , Thanks, have you been able to count those strange mails (without ID)? How many were there? Maybe only one?

[kodama12]

@santa112233 , Thanks, have you been able to count those strange mails (without ID)? How many were there? Maybe only one?

for my situation, i got many "strange" emails, more than the log can printed on my computer, so i cannot guess and find if they are listed in the final reports

[leodevbro]

If it will not take much time, please add these codes too to see how many strange mails did it detect, it is very interesting for improving my software.

Here:
src/utils/mailHeadersUtils.ts -> export const processParsedMail
add this code:

    if (typeof (step as any).strangeMailsCount !== 'number') {
      (step as any).strangeMailsCount = 1;
    } else {
      (step as any).strangeMailsCount += 1;
    }

like this:

and here:
src/index.ts -> const logExecutionEndMessage
add this code:

  console.log('strange mails count', (step as any).strangeMailsCount);

like this:

It will log the count of strange mails when execution finishes.