Mail-In-A-Box is a complete mail server, that included webmail, smtp, imap, pop3. https://mailinabox.email Installation You need Ubuntu 14.04 to install Mail-In-A-Box. Before you start installation, make sure you have server hostname set properly. To start installation, run curl -s https://mailinabox.email/setup.sh | sudo bash During installation, it ask you to set password for admin email account … Read more
Dovecot is a IMAP/POP3 server. To install on Debian/Ubuntu, run apt install dovecot-core -y To see dovecot config, run root@ok:~# doveconf -n # 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf # Pigeonhole version 0.4.13 (7b14904) # OS: Linux 4.4.0-62-generic x86_64 Ubuntu 16.04.3 LTS mail_location = mbox:~/mail:INBOX=/var/mail/%u namespace inbox { inbox = yes location = mailbox Drafts { special_use = … Read more
Configure ElasticEmail with Postfix
To configure ElasticEmail with postfix, first install sasl support On Debian/Ubuntu apt-get install libsasl2-modules On RHEL/CentOS yum install cyrus-sasl-plain Edit postfix config vi /etc/postfix/main.cf On Ubuntu/Debian, you need to comment the line starting with “relayhost”. Add following smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous smtp_sasl_tls_security_options = noanonymous smtp_tls_security_level = encrypt header_size_limit = 4096000 … Read more
To setup mail forward in postfix, Edit postfix config file vi /etc/postfix/main.cf Add virtual_alias_domains = /etc/postfix/virtual_alias_domains virtual_alias_maps = hash:/etc/postfix/virtual_alias_maps Create file /etc/postfix/virtual_alias_domains vi /etc/postfix/virtual_alias_domains Add your domains on this file. 1 Per line. Example [root@s125359 ~]# cat /etc/postfix/virtual_alias_domains webhostingneeds.com netfreehost.com [root@s125359 ~]# Here i have 2 domains added, postfix will service as incoming email server … Read more
Configure Postfix to sent emails using MailGun Transnational Email Providers SASL authentication no mechanism available
First install requirements apt-get update && apt-get install postfix libsasl2-modules -y Run sed -i “s/default_transport = error/# default_transport = error/g” /etc/postfix/main.cf sed -i “s/relay_transport = error/# relay_transport = error/g” /etc/postfix/main.cf sed -i “s/relayhost =/# relayhost =/g” /etc/postfix/main.cf Edit /etc/postfix/main.cf vi /etc/postfix/main.cf Add relayhost = [smtp.mailgun.org]:2525 smtp_tls_security_level = encrypt smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options … Read more
To check if a mail server support SSL/TLS, run openssl s_client -connect MAIL_SERVER_IP:PORT -starttls smtp Example openssl s_client -connect smtp.elasticemail.com:25 -starttls smtp mail openssl
http://www.openspf.org/SPF_Record_Syntax Here is some SPF examples DMARC record If you need to reject email, add p=quarantine If DMARC failed, remore mail server will accept the mail, but mark it as spam. If you just need the report, add YOU@YOUR-DOMAIN.COM – This can be any email address to which you need DMARC reports sent. Mail providers … Read more
Here is a bash script to delete mails in exim mail queue. Helpful when you have lot of spam mails in mail queue. Create file vi /usr/local/bin/eximrm Add #!/bin/bash exim -bpu | awk ‘{print $3}’ | xargs exim -Mrm Make it executable chmod 755 /usr/local/bin/eximrm Monitor Server Mail Queue Run following script every 1 hour … Read more
When sending email from postfix mail sever that use mailgun for relaying mails, i get error Jan 4 03:16:06 serverok-vm postfix/qmgr[22652]: 795731A8D: from=, size=820, nrcpt=1 (queue active) Jan 4 03:16:06 serverok-vm postfix/smtp[24050]: warning: SASL authentication failure: No worthy mechs found Jan 4 03:16:06 serverok-vm postfix/smtp[24050]: 795731A8D: SASL authentication failed; cannot authenticate to server smtp.mailgun.org[34.237.7.101]: no … Read more
Many cloud hosting providers, including Google Cloud, AWS, Microsoft Azure, and DigitalOcean, do not support sending emails directly from their servers. They often recommend using a third-party SMTP service for sending emails. Third-party SMTP servers enhance email deliverability and eliminate the need to manage your own email server. When hosting on a shared server, email … Read more