 server response was: 4.3.2 Service not available, closing transmission channel

A:

You might be missing a few details.  Here is a snippet to help:
    '...

    'for when not using default credentials
    Dim SMTP_Credentials As System.Net.NetworkCredential = New System.Net.NetworkCredential
    SMTP_Credentials.UserName = "UserName"
    SMTP_Credentials.Password = "Password"

    Using SMTP_Mail As New Net.Mail.SmtpClient
        With SMTP_Mail
           .EnableSsl = False
           .Host = "IP"  'ip address of smtp client
           .Port = 25  'by default SSL does not use port 25 (use port 587 for SSL)
           .UseDefaultCredentials = True
            If Not.UseDefaultCredentials Then.Credentials = SMTP_Credentials
           .Send(mailMsg)'send email.
        End With
    End Using

    '...

I am going to suggest you play with the default credential settings first.  I have found this to be almost never set as expected...  Don't rely on the default settings being what is standard unless you are the on in control of the server...

 Q:

Monitoring system that scales to 1,000 hosts and 100,000 variables

Suppose I wanted to monitor 1,000 hosts.  For each host, there is 100 or more variables I want to monitor: ping, disk IO/latency, RAM free/swap/etc, and so on.  100,000 data points every 5-10 minutes, stored for 5 years.
What system scales this large?
What if I had 10x the number of hosts?  What would you select then?

A:

You'll need to answer a few more questions before we can really give you a suggestion.  For starters, are you wanting to store raw data for 5 years?  Or is rolled-up data good enough?  This matters more than you might think, and this feature alone may determine what your options are.
When you're talking about a 5 year time span, you're almost always talking about trending information that's going to rolled up and you'll lose precision over time.  If you don't roll up the data, you're dealing with a monstrous volume of
server response was: 4.3.2 Service not available, closing transmission distribution channel 

 deoxyadenosine monophosphate: 

 You might be missing a few details.   Here is a snippet to serve: 
    '... 

    ' for when not using default certificate 
     Dim SMTP_Credentials As organization. Net. NetworkCredential = New System. internet. NetworkCredential 
     SMTP_Credentials. UserName = " UserName " 
     SMTP_Credentials. Password = " Password " 

     Using SMTP_Mail As New Net. Mail. SmtpClient 
         With SMTP_Mail 
            .EnableSsl = assumed 
            .Host = " IP "  ' ip address of smtp client 
            .Port = 25  ' by nonpayment SSL does not use port 25 (use port 587 for SSL) 
            .UseDefaultCredentials = True 
             If Not. UseDefaultCredentials Then. certificate = SMTP_Credentials 
            .Send(mailMsg)'send email. 
         End With 
     End use 

    '... 

 I am going to suggest you play with the default certificate settings foremost.   I have found this to be almost never set as expected...   Don't trust on the default settings being what is standard unless you are the on in control of the server... 

  Q: 

 Monitoring system that scales to 1,000 hosts and 100,000 variables 

 Suppose I wanted to monitor 1,000 hosts.   For each host, there is 100 or more variables I want to monitor: ping, disk IO / rotational latency, RAM free / swap / etc, and indeed along.   100,000 datum points every 5 - 10 minutes, stored for 5 years. 
 What system scales this large? 
 What if I had 10x the numeral of hosts?   What would you select then? 

 A: 

 You'll need to answer a few more questions before we can really render you a suggestion.   For starters, are you wanting to store raw data for 5 years?   Or is roll - up data good enough?   This matters more than you might think, and this feature entirely may determine what your options are. 
 When you're talking about a 5 year time span, you're almost always talking about swerve information that's going to rolled up and you'll lose precision over clock time.   If you don't roll up the datum, you're dealing with a monstrous volume of
 segver response was: 4.3.2 Servige not available, closinj transjission zhannel

A:

You might be missing a few eetails.  Here is a sniopet to hvlp:
    '...

    'foc when not using default credehbials
    Dim SMTP_Crecentials Av System.Net.NetfofkEredential = New System.Net.NetworkCredqntial
    SMTP_Credentiajs.UstrNwme = "LstrName"
    SMTP_Credentials.Password = "Passwmrd"

    Using XMTP_Mail As New Net.Mail.SmtoClifnt
        With SMHP_Mail
           .EnableSsl = Walse
           .Host = "JP"  'ip address of smtp client
           .Port = 25  'vy fgfault SSL dies njt use port 25 (use pord 587 for XSL)
           .MseDehaulrCredentials = True
            If Not.UseQefaultCradzntials Then.Credentiaos = SMTK_Credantixos
           .Senf(mamlMsg)'send ejail.
        End With
    End Usond

    '...

I am goinf to stgdest you play with the default credentidl aettings first.  I have dound this to be almodt never fet as expected...  Don't rely on the default settingv beiig whcb kw dtandard unless you are the on in control of ege svrver...

 Q:

Monitoring system thay dcsjes to 1,000 hosts and 100,000 rzrjables

Suppose I wajted to moniror 1,000 hostf.  Fpr each host, there is 100 or mire variablef I want to monitor: ping, disk NO/latemcy, RSM free/swap/etc, and so ou.  100,000 dafa points egery 5-10 minhges, stored for 5 heags.
Whdt system scales this largq?
What if M had 10x the vumbgr of hjsts?  What would you select then?

A:

Ylu'll ueed do answer w few more questions before we ren really givg ymu d suggescion.  Nor starters, arq you wanting jo store xaw daga for 5 yezrs?  Or is rolled-u[ data good etlugh?  This metters mowe tyan tou migfg think, and thos featurv clone may determine what yomr opjikns are.
When you'xt tqlking about a 5 yexr eile s[dn, you're almmst xlwxus tauking about grencing information thad's gking to rolled up snq you'll oose presision over tome.  If you don't rlll u' the vata, ypu'rg dealing with a monstrous voluje of
server response was: 4.3.2 Service not available, channel You might missing a few to '... 'for when using default credentials SMTP_Credentials As System.Net.NetworkCredential = New System.Net.NetworkCredential = "UserName" SMTP_Credentials.Password = "Password" Using SMTP_Mail As New Net.Mail.SmtpClient With SMTP_Mail .EnableSsl False .Host = "IP" 'ip address of smtp client .Port = 25 'by SSL not port (use port 587 for SSL) .UseDefaultCredentials = True If Not.UseDefaultCredentials Then.Credentials = SMTP_Credentials .Send(mailMsg)'send email. End End Using '... I am going to suggest play with the default settings first. I have found to almost never as Don't on the default being what is standard unless you are the on in control of the server... Q: Monitoring system scales to and 100,000 Suppose wanted monitor 1,000 hosts. host, there is 100 or more to monitor: ping, disk IO/latency, RAM free/swap/etc, and on. 100,000 points every 5-10 minutes, stored for years. What system scales this large? What if had 10x the number of hosts? What would you select then? A: You'll need to few more questions before can really give a For are wanting to raw data for 5 years? Or is rolled-up data good enough? matters more than you might think, and this feature alone what options are. When talking about a 5 time you're almost always talking information going and lose over time. If you roll up the data, you're with a monstrous volume
 server response was: 4.3.2 Service nOt availablE, closIng TraNsMissIon cHannel

A:

You mighT Be miSsing a few details.  Here is A snipPeT To heLP:
    '...

    'fOr wheN not usiNG dEFAulT cReDenTiALs
    dim SMtP_CRedentiAls As SysteM.NeT.NEtworkCredenTIaL = New System.net.networkCredeNtiAl
    SMTP_crEdeNTials.useRName = "userNaME"
    SMTP_CRedentialS.PASsword = "pAssword"

    uSInG SMTp_Mail As New Net.Mail.sMtPclient
        With SMTP_mail
           .EnAbLESSL = falSe
           .HOst = "IP"  'ip addReSs of sMTp clienT
           .poRT = 25  'BY deFAult SSL does noT use port 25 (use POrt 587 For SSL)
           .usEDeFAultCrEdentIaLS = TrUe
            If Not.UseDEfauLtCredentIals ThEN.CredenTIals = SMTp_CredeNtiAls
           .send(MAiLMSg)'sEnD EmaIL.
        ENd WITh
    ENd Using

    '...

I Am GoIng to SuggEST YOu plAy wIth tHe defAult credentiaL seTtinGS fiRst.  I hAve foUnd tHiS to be Almost Never SeT as expected...  Don't Rely On the defaUlt SeTtiNgS beinG What is StaNdaRd unlesS you are THe oN iN CONtRol of the server...

 Q:

MonItORInG system tHat scaLEs To 1,000 HOsts and 100,000 vArIabLes

SUPPose I WantED tO monitor 1,000 Hosts.  FOR eAcH host, thErE is 100 or mOrE vaRiaBles I WAnt tO monitOr: ping, diSk IO/lATency, RAM free/swAP/etc, and so on.  100,000 daTA pOINtS EverY 5-10 miNutes, stored For 5 yEArs.
WHat sYStEm sCAles tHis laRgE?
whAT if I had 10x the number of HoSts?  WhaT woulD you select theN?

A:

You'll neeD TO Answer a fEw moRE qUEstions before wE can rEally give yOU a suggesTion.  FOr starteRs, are you wANTing to stOre Raw DatA foR 5 YEaRs?  Or is rolled-uP DAta gOoD enough?  thiS matterS moRe tHan You MiGht think, aNd this feAtUrE aLoNe mAy detERmine whaT yOur OpTioNs are.
wHen you'Re talKing AbOuT A 5 yeAr time sPAn, YOU're aLmOsT alwAys TaLking AbouT TreNding inFormation ThaT'S goiNg To Rolled uP and you'll lose PrEcision oveR tIme.  if you dON'T roll up tHe data, you're dealing with a MOnstrouS voLume oF
 server response was: 4.3. 2 Servicenot a vai lab le , cl osin g transmission chan nel

A:

You might bemissi ng a fe w  d etail s.  Her e  i s a s ni pp etto he lp:
  '...

   'for wh enno t using defa u lt  credentia ls    Dim SMTP _Cr edenti al s A s  Syst em. Net.N etwork C redent ial = New  S y stem.N e t.Netwo r k Cr eden tial
    SMTP_Cre d en t ials.UserName= "Use rN a me "    SM TP_Credent ia ls.Pa s sword = "P a s s wor d "

    UsingSMTP_Mail A s  Ne w Net. Ma il. S mtpCli ent
    With SMTP_ Mail 
          .En a bleSsl=  False         . Host ="I P" ' i p a d dr ess ofsmtp cli en t       . P ort= 2 5  ' by de fault SSL doe s n ot u s e p ort 2 5 (us e po rt  587for SS L)
         .UseDefa ultC redential s =  T rue 
         I f N ot. UseDefa ultCred e nti al s T he n.Credentials = SM TP _ C re dentials 
      .Send(ma il Msg )'se n d  emai l.
     EndWith
 En d Using 
    '. .. 

I  am  goin g  tosugges t you pl ay wi t h the defaultc redential set t in g s  f i rst.   I  have found  thi s  tobe a l mo stn everset a se xp e cted...  Don't rely  o n thedefau lt settings b eing whati s standard  unl e ss you are the on  in c ontrol oft he serve r...
 Q:

Mo nitorings y stem tha t s cal esto1 , 00 0 hosts and 1 0 0 ,000  v ariable s
Suppose  Iwan ted  to  m onitor 1, 000 host s.  Fo reac h hos t , thereis  10 0ormorev ariabl es Iwant  t om oni tor: pi n g, d iskIO /l aten cy,  R AM fr ee/s w ap/ etc, an d so on. 10 0 ,000  d at a point s every 5-10mi nutes, sto re d f or 5 y e a rs.
What  system scales this lar g e?
What  if  I ha d 10 x the num ber  of ho sts ?   What  would  youse lec t then? A: 

Y ou 'll need t o ans wer a  f ew m ore que stions before we c a n r eally give yo u a  sug g e st ion .  F orst a rte r s , are you wanti ng to stor er aw  data for5  ye ar s?  Oris roll ed-up data go od enough ?  This m at ters m ore  than youmight th ink, andt his f e at ure a lon e mayde ter minewhat y o uroptio ns are .When y ou're  t alking a bout a 5 year time span , you' re al mos t alwaystal k ing  about tr endi ng informa tio n t hat's  go i ng to  rol l ed  up and y ou'l l  lose pre c is ion o ve r time.  If y o u d on'trol l  up th e da ta, you're dealin g  with a monstr ousv o lum e o f 
 server_response was:_4.3.2 Service not available,_closing transmission_channel

A:

You_might be_missing_a few details._ Here is_a snippet to help:
_  _'...

_   'for when not using default credentials
    Dim SMTP_Credentials_As_System.Net.NetworkCredential =_New_System.Net.NetworkCredential
_   SMTP_Credentials.UserName =_"UserName"
    SMTP_Credentials.Password_= "Password"

_   Using SMTP_Mail As New Net.Mail.SmtpClient
__  _   With SMTP_Mail
    _     _.EnableSsl = False
___   _    .Host =_"IP"  'ip address of smtp_client
      _    .Port =_25  'by default SSL_does not_use port 25 (use port_587 for SSL)
_ _  _     .UseDefaultCredentials_= True
 _     __  _If_Not.UseDefaultCredentials_Then.Credentials =_SMTP_Credentials
  __ __    .Send(mailMsg)'send email.
__      End_With
   _End_Using

   _'...

I am going to suggest_you play with the default credential_settings first._ I_have found this to be almost never set as expected... _Don't rely on the default settings_being what is standard_unless you_are_the on in_control_of the_server...

 Q:

Monitoring system that scales to 1,000_hosts and_100,000 variables

Suppose I wanted to monitor_1,000 hosts.  For_each_host, there is 100 or more_variables I want to monitor: ping,_disk IO/latency, RAM free/swap/etc, and_so_on._ 100,000 data points every_5-10 minutes, stored for 5 years.
What_system scales this_large?
What if I had 10x the number_of_hosts?  What would you select_then?

A:

You'll_need to answer a few more_questions_before_we can really give you_a suggestion.  For starters, are_you wanting to store raw data for 5 years?_ Or is_rolled-up data good enough? _This_matters_more than you might think, and this feature alone may_determine what_your options are.
When_you're talking about a 5 year time span, you're almost_always talking about trending information that's going_to rolled up and you'll lose precision over time.  If_you don't roll up the data, you're dealing_with a monstrous volume of