天津打造思政课品牌 听院士名师共讲“新时代”
百度 只要我们精诚合作，持续加强核安全，核能造福人类的前景必将更加光明。
Refers to the hardware or software that make up a server dedicated to sending and receiving emails. Many popular modern email servers bundle other functionality for contacts and calendaring along email delivery.
3,158 questions
-1
votes
1
answer
50
views
Sharing port 443 between Caddy and a Stalwart mail server
I have a VPS that runs some web services. Caddy is set up to handle traffic on port 80 and 443. I'd also like to run a Stalwart mail server on this VPS. It too needs to run a service on port 443. ...
0
votes
1
answer
67
views
Postfix not using smtp_bind_address6 for sending
I've got Postfix running on a Ubuntu 22.04 box. The box has several IPv6 addresses, including a:b:c::2 and a:b:c::25. I want Postfix to use a:b:c::25 for sending messages.
a:b:c::25 has a PTR record ...
- 3
2
votes
1
answer
44
views
Email service: does removing user ability to auto-forward to popular providers (Gmail...) really increase reputation/deliverability score?
I am member of an an organization of > 10k people, with email address of the form [email protected].
Many users have configured an "auto-forward" of incoming emails to their address ...
- 861
-1
votes
1
answer
43
views
gmail rejecting email from my app [closed]
I am trying to send emails from my website hosted on pythonanywhere(using Python).
My email is hosted on bluehost.
Whenever I am sending to an gmail address i receive an email stating that: "The ...
0
votes
0
answers
26
views
Postfix as relay to scaleway generate rejected messages back to my server
I've got a postfix server running at home which relays outgoing email via scaleway. I've got the domains, SPF, DKIM and all that set up. I'm not having a problem with getting my emails delivered.
I've ...
- 231
0
votes
1
answer
33
views
postfix still sends to local account disabled by access map when another user's .forward file or alias references it
I moved from an old sendmail based mail server to a new Postfix one recently. On the old system when a user account was closed I would put an entry in a access map for sendmail like
To:olduser@ ...
- 101
1
vote
0
answers
76
views
Rspamd/ClamAV False Positives on Large Attachments
Setup: Ubuntu VPS running mailcow-dockerized
The Problem
I'm experiencing persistent false positives in RSPAMD where legitimate business emails with large attachments (10-25MB, presumably .pdf files) ...
- 11
0
votes
1
answer
71
views
How does one get the mailer-daemon to copy the bounced email report to an email address?
When a client contacts me to report a recipient is receiving a bounced email "Undelivered Mail Returned to Sender", I ask them to kindly get the recipient to forward me the bounced email ...
- 101
0
votes
1
answer
98
views
550-Verification failed for no reason
I am running several websites on Host Europe Webserver. SPF, DKIM, and MX-Record are set properly and exactly as they are provided by Host Europe. When I send mails to a Managed Server from Hetzner, ...
- 3
0
votes
0
answers
197
views
Office 365 keeps marking our messages as Junk
The problem, in a nutshell: Office 365 is filing all messages from our domain as Junk.
We are running a sendmail based server, and all messages that we send to any O365 user end up in their Junk ...
- 1
0
votes
0
answers
200
views
Best way to collect detailed mail server statistics (Postfix)?
I'm managing a Postfix mail server and looking for a robust and privacy-conscious way to collect detailed statistics for system-wide dashboards. I want to track metrics such as:
Number of sent/...
- 121
0
votes
1
answer
33
views
Calling postmap ldap-domains.cf returns a missing database query
root@mail [/etc/postfix] # !819
postmap -q mydomain.io ldap:/etc/postfix/ldap-domains.cf mydomain.io
postmap: fatal: open database mydomain.io.db: No such file or directory
ldap-domains.cf
...
- 430
0
votes
1
answer
81
views
Postfix receiving "Unable to bind to server ldap://...." - server is available however
I have the following postfix configuration:
virtual_mailbox_maps = ldap:/etc/postfix/ldap-users.cf
virtual_mailbox_domains = ldap:/etc/postfix/ldap-domains.cf
virtual_alias_maps = ldap:/etc/postfix/...
- 430
0
votes
0
answers
38
views
How to set multiple e-mail servers correctly?
I installed a web server using Postfix, Dovecot, Roundcube Apache2 and Ubuntu 20. I created spf record (v=spf1 mx ~all), default._domainkey record and a _dmarc record in my all domains' DNS panels.
...
- 1
0
votes
0
answers
78
views
How to Prevent DMARC Failures for Forwarded Emails in a Business Email Environment?
We have implemented DMARC (Domain-based Message Authentication, Reporting, and Conformance) with a "p=reject" policy to enhance email security and prevent spoofing for our business domain. ...
