Set Up msmtp with Per-Account Profiles

Prerequisites

1. msmtp installed and at least one account working.

2. If you are new to msmtp, complete Setting Up msmtp for Sending first.

Add Multiple Account Blocks

1. Edit your msmtp config file (~/.config/msmtp/config or ~/.msmtprc):

defaults
auth           on
tls            on
tls_trust_file /etc/ssl/certs/ca-certificates.crt
logfile        ~/.config/msmtp/msmtp.log

account        personal
host           smtp.example.com
port           465
tls_starttls   off
from           you@example.com
user           you@example.com
passwordeval   "pass mail/you@example.com"

account        work
host           smtp.company.com
port           587
tls_starttls   on
from           work@company.com
user           work@company.com
passwordeval   "pass mail/work@company.com"

account default : personal

The account default : personal line sets a fallback account.

Expected result: msmtp -a personal and msmtp -a work each use the correct server.

Test Each Account

1. Send a test message from each:

echo "Test personal" | msmtp -a personal you@example.com
echo "Test work"     | msmtp -a work work@company.com

2. Check the log:

tail ~/.config/msmtp/msmtp.log

Expected result: both messages are delivered successfully.

Switch Accounts in NeoMutt with folder-hook

1. Add folder-hooks that set $sendmail when you enter each account’s mailbox:

folder-hook "you@example.com"  "set sendmail='msmtp -a personal'"
folder-hook "work@company.com" "set sendmail='msmtp -a work'"

Expected result: composing a message from a work mailbox sends via the work SMTP account.

Switch Accounts with send-hook

If you want to select the account based on the sender address rather than the current folder:

send-hook '~f you@example.com'  "set sendmail='msmtp -a personal'"
send-hook '~f work@company.com' "set sendmail='msmtp -a work'"

Expected result: the SMTP account matches the From address on the outgoing message.

Set a Default Account in NeoMutt

1. Set the default sendmail value before your hooks:

set sendmail = "msmtp -a personal"

Expected result: messages use the personal account unless a hook overrides it.

Enable Delivery Logging

The logfile line in the msmtp config records every delivery attempt. Check it when troubleshooting:

tail -20 ~/.config/msmtp/msmtp.log

Expected result: each entry shows the account used, the recipient, and the server response.

See Setting Up msmtp for Sending for the full setup tutorial and Hooks for more on NeoMutt hooks.