Skip to main content
The 2026 Annual Developer Survey is live— take the Survey today!.

Questions tagged [email]

Ask Question

The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.

6,761 questions
Newest Active Bountied Unanswered
Score of 1
2 answers
208 views

I'm having a problem with my SPF. Looking in mxtoolbox.com for my SPF record, I get the error Too many included lookups. I should have to remove some of my 'include' options or try to flatten some of ...
Score of 1
5 answers
238 views

I am wondering how feasible it is to send email with a DKIM-only setup, with an SPF record of v=spf1 -all. If my DMARC policy requires DKIM alignment then recipients who understand DMARC will still ...
Score of 0
1 answer
227 views

We are using PowerMTA and have recently warmed up new IPs. During the last 2 days, Yahoo/AOL has been returning TSS04 and TSS05 temporary deferrals even on the first emails sent from these IPs. ...
Score of 2
1 answer
380 views

My dovecot setup looks like this: # 2.4.2 (0962ed2104): /etc/dovecot/dovecot.conf # Pigeonhole version 2.4.2 (767418c3) # OS: Linux 6.12.0-160000.25-default x86_64 # Hostname: eagle # 9 default ...
Score of 0
2 answers
241 views

I have two servers. Both are running Ubuntu 24.04.4 LTS and postfix 3.8.6 (installed by the package manager). The postfix configurations are identical, with the exception of server-specific host and ...
Score of 0
0 answers
165 views

I’m looking for some advice around Postfix and whether it can help solve an issue we’re currently facing with outbound email control in Google Cloud Platform (GCP). Could you please update if the ...
Score of 0
3 answers
161 views

I have my own postfix which is sending emails through some external service. This external service is Roundcube but with one address "from" configured (account, not alias). I have already ...
Score of 1
1 answer
167 views

I have currently an older (3-5 years) running Email Server and I it's about time to migrate/update to a newer one. The multi-domain mail server is using Postfix, Dovecot, Postfixadmin, ClamAV and ...
Score of 0
1 answer
65 views

This postfix install is working for relaying email addresses in a virtual file. Now I want it to send emails from a local Nextcloud web site. It errors with the next message: postfix log: Jan 8 14:...
Score of 0
1 answer
303 views

I've set up a rule in Exchange online to forward all emails sent by a mailbox to forward to specific users. It works fine if I don't specify any conditions other than than the "sender", and ...
Score of 0
1 answer
229 views

Note: Server Address block below hidden with 198.51.100.0 . All other address blocks are as provided by the log. The email feedback stats: > LOG: MAIN cwd=/usr/local/cpanel/whostmgr/docroot 4 ...
Score of 0
3 answers
155 views

I have a virtual address ([email protected]) that receives external messages and forwards them to an authenticated email inbox. The problem is that I'm receiving spam with this forwarding address as ...
Score of 0
1 answer
168 views

So I have a slightly convoluted set up where emails to one address are meant to forward to another. This worked until it suddenly stopped working on 1st November. My hypothesis is that this was due to ...
Score of 4
1 answer
295 views

I’m testing outbound deliverability from a Postfix server. When I send email through authenticated SMTP, it lands in the recipient inbox (SPF, DKIM, and DMARC all pass). When I send using PHP’s built-...
Score of 0
1 answer
191 views

We have a few domains, which are not expected to send emails, therefore I would like to know if there is a way to effectively forbid those domains to send emails to prevent spoofing my company various ...

15 30 50 per page
1
2 3 4 5
…
451