Hi Frank, 

To answer the question: "not me", but any STMP reply that includes (AS[0-9]+) 
is related to spam detection/reputation issues.
Those "Server busy" without such codes can perfectly is that servers are, in 
fact, busy (so you should try again, maybe fallback a bit).

When talking with the support a few weeks back, we provided the proportion of 
each ASXXX numbers in our logs for a given IP/pool/client, as although I don't 
know what each code is about, that could help them spot something specific on 
their side (for the cases where I _know_ that there's no reason to consider the 
emails as spam).

Are you seeing many more "Server busy" without than with ASXXX ?

Hope that helps, 
--

Benjamin Billon

-----Original Message-----
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of frnk...@iname.com
Sent: Thursday, 22 February, 2018 18:28
To: mailop@mailop.org
Subject: [mailop] Email issues to outlook.com and hotmail.com this 
afternoon/evening

Anyone else see email queued up to outlook.com and Hotmail.com domains?  It 
started around 5:30 pm U.S. Central and we're still seeing some issues.  

Here are some just some status logs from our email servers:

<redacted>@outlook.com Site outlook.com (104.47.38.33) said after data sent:
452 4.3.1 Insufficient system resources (TSTE) 
[BL2NAM02HT002.eop-nam02.prod.protection.outlook.com]
[BL2NAM02FT001.eop-nam02.prod.protection.outlook.com]
<redacted>@outlook.com ubad=-1386839216, Site (outlook.com/104.47.38.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BL2NAM02FT028.eop-nam02.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1678146736, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.28].
(AS843) [BN3NAM01FT001.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1390394544, Site (hotmail.com/104.47.45.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [CO1NAM04FT040.eop-NAM04.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1386839216, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.26].
(AS761) [BN3NAM01FT029.eop-nam01.prod.protection.outlook.com]
<redacted>@msn.com ubad=-1386839216, Site (msn.com/104.47.6.33) said: 451
4.7.500 Server busy. Please try again later from [96.31.0.27]. (AS843) 
[VE1EUR02FT061.eop-EUR02.prod.protection.outlook.com]
<redacted>@msn.com ubad=-1386839216, Site (msn.com/104.47.6.33) said: 451
4.7.500 Server busy. Please try again later from [96.31.0.20]. (AS843) 
[VE1EUR02FT047.eop-EUR02.prod.protection.outlook.com]
<redacted>@outlook.com ubad=-1380134064, Site (outlook.com/104.47.38.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BL2NAM02FT023.eop-nam02.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1380134064, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.28].
(AS843) [BN3NAM01FT045.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1402289328, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BN3NAM01FT056.eop-nam01.prod.protection.outlook.com]
<redacted>@outlook.com ubad=-1537227952, Site (outlook.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.28].
(AS761) [BN3NAM01FT003.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1537227952, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [BN3NAM01FT047.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1377012912, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [BN3NAM01FT006.eop-nam01.prod.protection.outlook.com]
<redacted>@outlook.com ubad=-1514519728, Site (outlook.com/104.47.38.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [BL2NAM02FT017.eop-nam02.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1396481200, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BN3NAM01FT033.eop-nam01.prod.protection.outlook.com]
<redacted>@msn.com ubad=-1495354544, Site (msn.com/104.47.6.33) said: 451
4.7.500 Server busy. Please try again later from [96.31.0.27]. (AS843) 
[VE1EUR02FT056.eop-EUR02.prod.protection.outlook.com]
<redacted>@msn.com ubad=-1380134064, Site (msn.com/104.47.6.33) said: 451
4.7.500 Server busy. Please try again later from [96.31.0.28]. (AS843) 
[VE1EUR02FT036.eop-EUR02.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1398660272, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BN3NAM01FT058.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1678146736, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [BN3NAM01FT001.eop-nam01.prod.protection.outlook.com]
<redacted>@outlook.com ubad=-1503435952, Site (outlook.com/104.47.38.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.26].
(AS843) [BL2NAM02FT018.eop-nam02.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1678146736, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.20].
(AS843) [BN3NAM01FT001.eop-nam01.prod.protection.outlook.com]
<redacted>@hotmail.com ubad=-1403702448, Site (hotmail.com/104.47.33.33)
said: 451 4.7.500 Server busy. Please try again later from [96.31.0.27].
(AS843) [BN3NAM01FT020.eop-nam01.prod.protection.outlook.com]

Frank


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