Update smtppool lib adding support for Unicode in e-mail IDs

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/jmoiron/sqlx v1.2.0
 	github.com/knadh/goyesql/v2 v2.1.1
 	github.com/knadh/koanf v0.12.0
-	github.com/knadh/smtppool v0.2.0
+	github.com/knadh/smtppool v0.2.1
 	github.com/knadh/stuffbin v1.1.0
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.3.0 // indirect

go.sum

@@ -50,6 +50,8 @@ github.com/knadh/smtppool v0.1.1 h1:pSi1Gc5TXOaN/Z/YiqfZbk/vd9dqzXzAfQiss0QSGQU=
 github.com/knadh/smtppool v0.1.1/go.mod h1:3DJHouXAgPDBz0kC50HukOsdapYSwIEfJGwuip46oCA=
 github.com/knadh/smtppool v0.2.0 h1:+llTWRljNIVg05MMu9TiefELTNwblexjsd1ALAPXZUs=
 github.com/knadh/smtppool v0.2.0/go.mod h1:3DJHouXAgPDBz0kC50HukOsdapYSwIEfJGwuip46oCA=
+github.com/knadh/smtppool v0.2.1 h1:J97q7s6bOsyexHPQRsV4GBX+Ru5dXKXhpZaaS5leu4E=
+github.com/knadh/smtppool v0.2.1/go.mod h1:3DJHouXAgPDBz0kC50HukOsdapYSwIEfJGwuip46oCA=
 github.com/knadh/stuffbin v1.0.0 h1:NQon6PTpLXies4bRFhS3VpLCf6y+jn6YVXU3i2wPQ+M=
 github.com/knadh/stuffbin v1.0.0/go.mod h1:yVCFaWaKPubSNibBsTAJ939q2ABHudJQxRWZWV5yh+4=
 github.com/knadh/stuffbin v1.1.0 h1:f5S5BHzZALjuJEgTIOMC9NidEnBJM7Ze6Lu1GHR/lwU=