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Mail Server Support
Technical discussions with systems administrators about email servers, software, and appliances.
Microsoft Exchange
Support for Microsoft Exchange mail servers
Threads
41
Messages
104
Threads
41
Messages
104
Tens maybe Hundreds of Thousands of Exchange Servers Hacked
Apr 2, 2021
EQ Admin
IMAP Tools
IMAP migration scripts and technical support
Threads
35
Messages
153
Threads
35
Messages
153
A
SMTP Outgoing mail not sending
May 28, 2018
arytxer
Sendmail
Support for sendmail mail servers
Threads
17
Messages
30
Threads
17
Messages
30
Asp.net c# - Sending email with french characters in ToAddress
Jan 21, 2016
EQ Admin
Postfix
Support for postfix mail servers
Threads
25
Messages
74
Threads
25
Messages
74
Postfix - Virtual Alias Table Automated Population
Feb 24, 2022
postmanpat666
qmail
Support for qmail mail servers
Threads
102
Messages
271
Threads
102
Messages
271
O
Qmail does not forward emails with "=" in sender email address
May 6, 2019
Ove Halseth
Zimbra
Support for Zimbra mail servers
Threads
16
Messages
19
Threads
16
Messages
19
zimbra-core is missing
Jan 20, 2019
Latest Questions
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#5.3.4 SMTP; 552 Message size exceeds maximum permitted
EQ Admin
Mar 6, 2012
Replies
0
Views
18K
Mar 6, 2012
EQ Admin
(#5.4.6) Sorry. Although I'm listed as a best-preference MX or A for that host
EQ Admin
Dec 17, 2013
Replies
0
Views
6K
Dec 17, 2013
EQ Admin
(Solved in 2021!) How to grow Ubuntu 20 root filesystem in AWS
EQ Admin
Apr 10, 2021
Replies
0
Views
6K
Apr 10, 2021
EQ Admin
208.65.145.2 Remote host said: 554 Denied mxlogic.net (Mode: normal)
EQ Admin
May 20, 2014
Replies
2
Views
7K
Jun 10, 2015
EQ Admin
250 Message Queued (Timeout reading DATA command response from backend)
EQ Admin
Dec 4, 2013
Replies
0
Views
4K
Dec 4, 2013
EQ Admin
421 4.7.0 Our system has detected an unusual rate of unsolicited mail originating from your IP
EQ Admin
Apr 28, 2014
Replies
0
Views
8K
Apr 28, 2014
EQ Admin
421 PR(ct1) (BAY0-MC4-F8) - We have limits for how many messages can be sent per hour/day
EQ Admin
Oct 12, 2011
Replies
0
Views
5K
Oct 12, 2011
EQ Admin
421 smtp out of connection slots
EQ Admin
Oct 15, 2011
Replies
0
Views
7K
Oct 15, 2011
EQ Admin
421 too many connections
EQ Admin
Mar 2, 2012
Replies
0
Views
5K
Mar 2, 2012
EQ Admin
421 Too many spams from your IP
EQ Admin
Oct 12, 2011
Replies
0
Views
5K
Oct 12, 2011
EQ Admin
451 Invalid Smtp line - Should end with CRLF
EQ Admin
Jan 15, 2011
Replies
0
Views
7K
Jan 15, 2011
EQ Admin
451 VS* Excessive unknown recipients - possible Open Relay
EQ Admin
Aug 18, 2009
Replies
0
Views
3K
Aug 18, 2009
EQ Admin
452 4.3.1 Insufficient system resources
EQ Admin
Mar 6, 2012
Replies
0
Views
5K
Mar 6, 2012
EQ Admin
5% LuxSci Coupon Code from Email Questions
EQ Admin
Jul 24, 2013
Replies
0
Views
5K
Jul 24, 2013
EQ Admin
5.7.0 SMTP; 503 5.7.0 encryption too weak 0 less than 128
EQ Admin
Sep 27, 2010
Replies
0
Views
14K
Sep 27, 2010
EQ Admin
521 blocked by blacklist.mailrelay.att.net 521 DNSRBL Blocked for abuse
EQ Admin
Sep 12, 2013
Replies
0
Views
5K
Sep 12, 2013
EQ Admin
550 -verification failed
fearmydesign
Nov 3, 2010
Replies
12
Views
15K
Dec 1, 2010
fearmydesign
550 5.7.1 Service unavailable - blocked using Trend Micro RBL+
EQ Admin
Dec 14, 2012
Replies
0
Views
16K
Dec 14, 2012
EQ Admin
550 5.7.1 Your IP is blacklisted. Click delist.emailfiltering.com to delist
EQ Admin
Feb 27, 2012
Replies
0
Views
4K
Feb 27, 2012
EQ Admin
550 Error - Blocked for abuse
EQ Admin
Sep 3, 2013
Replies
0
Views
4K
Sep 3, 2013
EQ Admin
550 IP x.x.x.x is blocked by EarthLink
EQ Admin
Oct 30, 2013
Replies
0
Views
5K
Oct 30, 2013
EQ Admin
550 SC-001 (BAY0-MC3-F44)
EQ Admin
Dec 2, 2011
Replies
0
Views
4K
Dec 2, 2011
EQ Admin
550-5.1.1_unnecessary_spaces double-checking_the_recipient's_email_address_for_typos
EQ Admin
Oct 15, 2011
Replies
0
Views
3K
Oct 15, 2011
EQ Admin
550-DENIED You appear to be Phishing
EQ Admin
Aug 13, 2012
Replies
0
Views
2K
Aug 13, 2012
EQ Admin
553 5.3.0 flph384 DNSBL:RBL 521
Latest Questions
Dec 28, 2015
Replies
0
Views
3K
Dec 28, 2015
Latest Questions
S
553 sorry, that domain isn't in my list of allowed rcpthosts; no valid cert for gatewaying (#5.7.1)
snowflake
May 28, 2014
Replies
3
Views
23K
Oct 20, 2014
EQ Admin
553 spam at messagelabs for more information. #5.7.1 in reply to reply to RCPT TO command
EQ Admin
Jun 28, 2012
Replies
0
Views
5K
Jun 28, 2012
EQ Admin
554 5.1.0 Sender denied
EQ Admin
Feb 8, 2012
Replies
0
Views
44K
Feb 8, 2012
EQ Admin
554 5.7.1 Service unavailable Sender address blocked using local dbl rbl
EQ Admin
Mar 6, 2012
Replies
0
Views
29K
Mar 6, 2012
EQ Admin
554 5.7.1 This message has been blocked because it is from a FortiGuard - AntiSpam black IP address
EQ Admin
Mar 12, 2012
Replies
0
Views
36K
Mar 12, 2012
EQ Admin
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