Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Sending blessings on the Prophet (PBUH) in a dream indicates following his Sunnah, victory over enemies, and fulfillment of needs.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Whoever sees himself sending blessings on the Prophet will gain honor, nobility, and see him (the Prophet) in a dream.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Sending blessings on the Prophet is interpreted as goodness, blessing, and salvation from hardships.